Just-world fallacy

From Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Just-world_fallacy 

The just-world fallacy, or just-world hypothesis, is the cognitive bias that assumes that "people get what they deserve" – that actions will necessarily have morally fair and fitting consequences for the actor. For example, the assumptions that noble actions will eventually be rewarded and evil actions will eventually be punished fall under this fallacy. In other words, the just-world fallacy is the tendency to attribute consequences to – or expect consequences as the result of – either a universal force that restores moral balance or a universal connection between the nature of actions and their results. This belief generally implies the existence of cosmic justice, destiny, divine providence, desert, stability, order, or the anglophone colloquial use of "karma". It is often associated with a variety of fundamental fallacies, especially in regard to rationalizing suffering on the grounds that the sufferers "deserve" it. This is called victim blaming.

This fallacy popularly appears in the English language in various figures of speech that imply guaranteed punishment for wrongdoing, such as: "you got what was coming to you", "what goes around comes around", "chickens come home to roost", "everything happens for a reason", "you reap what you sow", and "you brought this on yourself." This hypothesis has been widely studied by social psychologists since Melvin J. Lerner conducted seminal work on the belief in a just world in the early 1960s. Research has continued since then, examining the predictive capacity of the fallacy in various situations and across cultures, and clarifying and expanding the theoretical understandings of just-world beliefs.

Emergence

Many philosophers and social theorists have observed and considered the phenomenon of belief in a just world, going back to at least as early as the Pyrrhonist philosopher Sextus Empiricus, writing c. 180 CE, who argued against this belief. Lerner's work made the just-world hypothesis a focus of research in the field of social psychology.

Melvin Lerner

Lerner was prompted to study justice beliefs and the just-world fallacy in the context of social psychological inquiry into negative social and societal interactions. Lerner saw his work as extending Stanley Milgram's work on obedience. He sought to answer the questions of how regimes that cause cruelty and suffering maintain popular support, and how people come to accept social norms and laws that produce misery and suffering.

Lerner's inquiry was influenced by repeatedly witnessing the tendency of observers to blame victims for their suffering. During his clinical training as a psychologist, he observed treatment of mentally ill persons by the health care practitioners with whom he worked. Although Lerner knew them to be kindhearted, educated people, they often blamed patients for the patients' own suffering. Lerner also describes his surprise at hearing his students derogate (disparage, belittle) the poor, seemingly oblivious to the structural forces that contribute to poverty. The desire to understand the processes that caused these phenomena led Lerner to conduct his first experiments on what is now called the just-world fallacy.

Early evidence

In 1966, Lerner and his colleagues began a series of experiments that used shock paradigms to investigate observer responses to victimization. In the first of these experiments conducted at the University of Kansas, 72 female participants watched what appeared to be a confederate receiving electrical shocks for her errors during a learning task (learning pairs of nonsense syllables). Initially, these observing participants were upset by the victim's apparent suffering. But as the suffering continued and observers remained unable to intervene, the observers began to reject and devalue the victim. Rejection and devaluation of the victim was greater when the observed suffering was greater. But when participants were told the victim would receive compensation for her suffering, the participants did not derogate the victim. Lerner and colleagues replicated these findings in subsequent studies, as did other researchers.

Theory

To explain these studies' findings, it was theorized that there was a prevalent belief in a just world. A just world is one in which actions and conditions have predictable, appropriate consequences. These actions and conditions are typically individuals' behaviors or attributes. The specific conditions that correspond to certain consequences are socially determined by a society's norms and ideologies. Lerner presents the belief in a just world as functional: it maintains the idea that one can influence the world in a predictable way. Belief in a just world functions as a sort of "contract" with the world regarding the consequences of behavior. This allows people to plan for the future and engage in effective, goal-driven behavior. Lerner summarized his findings and his theoretical work in his 1980 monograph The Belief in a Just World: A Fundamental Delusion.

Lerner hypothesized that the belief in a just world is crucially important for people to maintain for their own well-being. But people are confronted daily with evidence that the world is not just: people suffer without apparent cause. Lerner explained that people use strategies to eliminate threats to their belief in a just world. These strategies can be rational or irrational. Rational strategies include accepting the reality of injustice, trying to prevent injustice or provide restitution, and accepting one's own limitations. Non-rational strategies include denial, withdrawal, and reinterpretation of the event.

There are a few modes of reinterpretation that could make an event fit the belief in a just world. One can reinterpret the outcome, the cause, and/or the character of the victim. In the case of observing the injustice of the suffering of innocent people, one major way to rearrange the cognition of an event is to interpret the victim of suffering as deserving. Specifically, observers can blame victims for their suffering on the basis of their behaviors and/or their characteristics. Much psychological research on the belief in a just world has focused on these negative social phenomena of victim blaming and victim derogation in different contexts.

An additional effect of this thinking is that individuals experience less personal vulnerability because they do not believe they have done anything to deserve or cause negative outcomes. This is related to the self-serving bias observed by social psychologists.

Many researchers have interpreted just-world beliefs as an example of causal attribution. In victim blaming, the causes of victimization are attributed to an individual rather than to a situation. Thus, the consequences of belief in a just world may be related to or explained in terms of particular patterns of causal attribution.

Alternatives

Veridical judgment

See also: Veridicality

Others have suggested alternative explanations for the derogation of victims. One suggestion is that derogation effects are based on accurate judgments of a victim's character. In particular, in relation to Lerner's first studies, some have hypothesized that it would be logical for observers to derogate an individual who would allow himself to be shocked without reason. A subsequent study by Lerner challenged this alternative hypothesis by showing that individuals are only derogated when they actually suffer; individuals who agreed to undergo suffering but did not were viewed positively.

Guilt reduction

Another alternative explanation offered for the derogation of victims early in the development of the just-world fallacy was that observers derogate victims to reduce their own feelings of guilt. Observers may feel responsible, or guilty, for a victim's suffering if they themselves are involved in the situation or experiment. In order to reduce the guilt, they may devalue the victim. Lerner and colleagues claim that there has not been adequate evidence to support this interpretation. They conducted one study that found derogation of victims occurred even by observers who were not implicated in the process of the experiment and thus had no reason to feel guilty.

Discomfort reduction

Alternatively, victim derogation and other strategies may only be ways to alleviate discomfort after viewing suffering. This would mean that the primary motivation is not to restore a belief in a just world, but to reduce discomfort caused by empathizing. Studies have shown that victim derogation does not suppress subsequent helping activity and that empathizing with the victim plays a large role when assigning blame. According to Ervin Staub, devaluing the victim should lead to lesser compensation if restoring belief in a just world was the primary motive; instead, there is virtually no difference in compensation amounts whether the compensation precedes or follows devaluation. Psychopathy has been linked to the lack of just-world maintaining strategies, possibly due to dampened emotional reactions and lack of empathy.

Additional evidence

After Lerner's first studies, other researchers replicated these findings in other settings in which individuals are victimized. This work, which began in the 1970s and continues today, has investigated how observers react to victims of random calamities like traffic accidents, as well as rape and domestic violence, illnesses, and poverty. Generally, researchers have found that observers of the suffering of innocent victims tend to both derogate and blame victims for their suffering. Observers thus maintain their belief in a just world by changing their cognitions about the victims' character.

In the early 1970s, social psychologists Zick Rubin and Letitia Anne Peplau developed a measure of belief in a just world. This measure and its revised form published in 1975 allowed for the study of individual differences in just-world beliefs. Much of the subsequent research on the just-world hypothesis used these measurement scales.

These studies on victims of violence, illness, and poverty and others like them have provided consistent support for the link between observers' just-world beliefs and their tendency to blame victims for their suffering. As a result, the existence of the just-world hypothesis as a psychological phenomenon has become widely accepted.

Violence

Researchers have looked at how observers react to victims of rape and other violence. In a formative experiment on rape and belief in a just world by Linda Carli and colleagues, researchers gave two groups of subjects a narrative about interactions between a man and a woman. The description of the interaction was the same until the end; one group received a narrative that had a neutral ending and the other group received a narrative that ended with the man raping the woman. Subjects judged the rape ending as inevitable and blamed the woman in the narrative for the rape on the basis of her behavior, but not her characteristics. These findings have been replicated repeatedly, including using a rape ending and a "happy ending" (a marriage proposal).

Other researchers have found a similar phenomenon for judgments of battered partners. One study found that observers' labels of blame of female victims of relationship violence increase with the intimacy of the relationship. Observers blamed the perpetrator only in the least intimate case of violence, in which a male struck an acquaintance.

Bullying

Researchers have employed the just-world fallacy to understand bullying. Given other research on beliefs in a just world, it would be expected that observers would derogate and blame bullying victims, but the opposite has been found: individuals high in just-world belief have stronger anti-bullying attitudes. Other researchers have found that strong belief in a just world is associated with lower levels of bullying behavior. This finding is in keeping with Lerner's understanding of belief in a just world as functioning as a "contract" that governs behavior. There is additional evidence that belief in a just world is protective of the well-being of children and adolescents in the school environment, as has been shown for the general population.

Illness

Other researchers have found that observers judge sick people as responsible for their illnesses. One experiment showed that persons suffering from a variety of illnesses were derogated on a measure of attractiveness more than healthy individuals were. In comparison to healthy people, victim derogation was found for persons presenting with indigestion, pneumonia, and stomach cancer. Moreover, derogation was found to be higher for those suffering from more severe illnesses, except for those presenting with cancer. Stronger belief in a just world has also been found to correlate with greater derogation of AIDS victims.

Poverty

More recently, researchers have explored how people react to poverty through the lens of the just-world fallacy. Strong belief in a just world is associated with blaming the poor, with weak belief in a just world associated with identifying external causes of poverty including world economic systems, war, and exploitation.

The self as victim

See also: Psychological response to rape and Self blame

Some research on belief in a just world has examined how people react when they themselves are victimized. An early paper by Dr. Ronnie Janoff-Bulman found that rape victims often blame their own behavior, but not their own characteristics, for their victimization. It was hypothesized that this may be because blaming one's own behavior makes an event more controllable.

Theoretical refinement

Subsequent work on measuring belief in a just world has focused on identifying multiple dimensions of the belief. This work has resulted in the development of new measures of just-world belief and additional research. Hypothesized dimensions of just-world beliefs include belief in an unjust world, beliefs in immanent justice and ultimate justice, hope for justice, and belief in one's ability to reduce injustice. Other work has focused on looking at the different domains in which the belief may function; individuals may have different just-world beliefs for the personal domain, the sociopolitical domain, the social domain, etc. An especially fruitful distinction is between the belief in a just world for the self (personal) and the belief in a just world for others (general). These distinct beliefs are differentially associated with positive mental health.

Correlates

Researchers have used measures of belief in a just world to look at correlates of high and low levels of belief in a just world.

Limited studies have examined ideological correlates of the belief in a just world. These studies have found sociopolitical correlates of just-world beliefs, including right-wing authoritarianism and the Protestant work ethic. Studies have also found belief in a just world to be correlated with aspects of religiosity.

Studies of demographic differences, including gender and racial differences, have not shown systematic differences, but do suggest racial differences, with black people and African Americans having the lowest levels of belief in a just world.

The development of measures of just-world beliefs has also allowed researchers to assess cross-cultural differences in just-world beliefs. Much research conducted shows that beliefs in a just world are evident cross-culturally. One study tested beliefs in a just world of students in 12 countries. This study found that in countries where the majority of inhabitants are powerless, belief in a just world tends to be weaker than in other countries. This supports the theory of the just-world fallacy because the powerless have had more personal and societal experiences that provided evidence that the world is not just and predictable.

Belief in an unjust world has been linked to increased self-handicapping, criminality, defensive coping, anger and perceived future risk. It may also serve as an ego-protective belief for certain individuals by justifying maladaptive behavior.

Current research

Although much of the initial work on belief in a just world focused on its negative social effects, other research suggests that belief in a just world is good, and even necessary, for mental health. Belief in a just world is associated with greater life satisfaction and well-being and less depressive affect. Researchers are actively exploring the reasons why the belief in a just world might have this relationship to mental health; it has been suggested that such beliefs could be a personal resource or coping strategy that buffers stress associated with daily life and with traumatic events. This hypothesis suggests that belief in a just world can be understood as a positive illusion. In line with this perspective, recent research also suggests that belief in a just world may explain the known statistical association between religiosity/spirituality and psychological well-being. Some belief in a just world research has been conducted within the framework of primal world beliefs, and has found strong correlations between just world belief and beliefs that the world is safe, abundant and cooperative (among other qualities).

Some studies also show that beliefs in a just world are correlated with internal locus of control. Strong belief in a just world is associated with greater acceptance of and less dissatisfaction with negative events in one's life. This may be one way in which belief in a just world affects mental health. Others have suggested that this relationship holds only for beliefs in a just world for oneself. Beliefs in a just world for others are related instead to the negative social phenomena of victim blaming and victim derogation observed in other studies.

Belief in a just world has also been found to negatively predict the perceived likelihood of kin favoritism. The perspective of the individual plays an important role in this relationship, such that when people imagine themselves as mere observers of injustice, general belief in a just world will be the stronger predictor, and when they imagine themselves as victims of injustice, personal belief in a just world will be the stronger predictor. This further supports the distinction between general and personal belief in a just world.

International research

More than 40 years after Lerner's seminal work on belief in a just world, researchers continue to study the phenomenon. Belief in a just world scales have been validated in several countries such as Iran, Russia, Brazil, and France. Work continues primarily in the United States, Europe, Australia, and Asia. Researchers in Germany have contributed disproportionately to recent research. Their work resulted in a volume edited by Lerner and German researcher Leo Montada titled Responses to Victimizations and Belief in a Just World.

Green chemistry

From Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Green_chemistry

Green chemistry, similar to sustainable chemistry or circular chemistry, is an area of chemistry and chemical engineering focused on the design of products and processes that minimize or eliminate the use and generation of hazardous substances. While environmental chemistry focuses on the effects of polluting chemicals on nature, green chemistry focuses on the environmental impact of chemistry, including lowering consumption of nonrenewable resources and technological approaches for preventing pollution.

The overarching goals of green chemistry—namely, more resource-efficient and inherently safer design of molecules, materials, products, and processes—can be pursued in a wide range of contexts.

Definition

Green chemistry (also called sustainable chemistry) is the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances. The concept integrates pollution-prevention and process-intensification approaches at laboratory and industrial scales to improve resource efficiency and minimize waste and risk across the life cycle of chemicals and materials.

History

Green chemistry evolved and emerged from a variety of existing ideas and research efforts (such as Pollution Prevention, atom economy and catalysis) in the period leading up to the 1990s, in the context of increasing attention to problems of chemical pollution and resource depletion. The development of green chemistry in Europe and the United States was proceeded by a shift in environmental problem-solving strategies: a movement from command and control regulation and mandated lowering of industrial emissions at the "end of the pipe," toward the broad interdisciplinary concept of prevention of pollution through the innovative design of production technologies themselves. The narrower set of concepts later recognized and re-named as green chemistry coalesced in the mid- to late-1990s, along with broader adoption of the new term in the Academic literature (which prevailed over earlier competing terms such as "clean" and "sustainable" chemistry).

In the United States, the Environmental Protection Agency played a significant supporting role in evolving green chemistry out of its earlier pollution prevention programs, funding, and cooperative coordination with industry. At the same time in the United Kingdom, researchers at the University of York, who used the term "clean technology" in the early 1990s, contributed to the establishment of the Green Chemistry Network within the Royal Society of Chemistry, and the launch of the journal Green Chemistry. In 1991, in the Netherlands, a special issue called 'green chemistry' [groene chemie] was published in Chemisch Magazine. In the Dutch context, the umbrella term green chemistry was associated with the exploitation of biomass as a renewable feedstock.

Principles

In 1998, Paul Anastas (who then directed the Green Chemistry Program at the US EPA) and John C. Warner (then of Polaroid Corporation) published a set of principles to guide the practice of green chemistry. The twelve principles address a range of ways to lower the environmental and health impacts of chemical production, and also indicate research priorities for the development of green chemistry technologies.

The principles cover such concepts as:

• the design of processes to maximize the amount of raw material that ends up in the product;
• the use of renewable material feedstocks and energy sources;
• the use of safe, environmentally benign substances, including solvents, whenever possible;
• the design of energy efficient processes;
• avoiding the production of waste, which is viewed as the ideal form of waste management.

The twelve principles of green chemistry are:

1. Prevention: Preventing waste is better than treating or cleaning up waste after it is created.
2. Atom economy: Synthetic methods should try to maximize the incorporation of all materials used in the process into the final product. This means that less waste will be generated as a result.
3. Less hazardous chemical syntheses: Synthetic methods should avoid using or generating substances toxic to humans and/or the environment.
4. Designing safer chemicals: Chemical products should be designed to achieve their desired function while being as non-toxic as possible.
5. Safer solvents and auxiliaries: Auxiliary substances should be avoided wherever possible, and as non-hazardous as possible when they must be used.
6. Design for energy efficiency: Energy requirements should be minimized, and processes should be conducted at ambient temperature and pressure whenever possible.
7. Use of renewable feedstocks: Whenever it is practical to do so, renewable feedstocks or raw materials are preferable to non-renewable ones.
8. Reduce derivatives: Unnecessary generation of derivatives—such as the use of protecting groups—should be minimized or avoided if possible; such steps require additional reagents and may generate additional waste.
9. Catalysis: Catalytic reagents that can be used in small quantities to repeat a reaction are superior to stoichiometric reagents (ones that are consumed in a reaction).
10. Design for degradation: Chemical products should be designed so that they do not pollute the environment; when their function is complete, they should break down into non-harmful products.
11. Real-time analysis for pollution prevention: Analytical methodologies need to be further developed to permit real-time, in-process monitoring and control before hazardous substances form.
12. Inherently safer chemistry for accident prevention: Whenever possible, the substances in a process, and the forms of those substances, should be chosen to minimize risks such as explosions, fires, and accidental releases.

Trends

Attempts are being made not only to quantify the greenness of a chemical process but also to factor in other variables such as chemical yield, the price of reaction components, safety in handling chemicals, hardware demands, energy profile and ease of product workup and purification. In one quantitative study, the reduction of nitrobenzene to aniline receives 64 points out of 100 marking it as an acceptable synthesis overall whereas a synthesis of an amide using HMDS is only described as adequate with a combined 32 points.

Green-chemistry methods are applied to the development and manufacture of nanomaterials, with attention to life-cycle impacts and potential nanotoxicity.

Examples

Green solvents

Main article: Green solvent

The major application of solvents in human activities is in paints and coatings (46% of usage). Smaller volume applications include cleaning, de-greasing, adhesives, and in chemical synthesis. Traditional solvents are often toxic or are chlorinated. Green solvents, on the other hand, are generally less harmful to health and the environment and preferably more sustainable. Ideally, solvents would be derived from renewable resources and biodegrade to innocuous, often a naturally occurring product. However, the manufacture of solvents from biomass can be more harmful to the environment than making the same solvents from fossil fuels. Thus the environmental impact of solvent manufacture must be considered when a solvent is being selected for a product or process. Another factor to consider is the fate of the solvent after use. If the solvent is being used in an enclosed situation where solvent collection and recycling is feasible, then the energy cost and environmental harm associated with recycling should be considered; in such a situation water, which is energy-intensive to purify, may not be the greenest choice. On the other hand, a solvent contained in a consumer product is likely to be released into the environment upon use, and therefore the environmental impact of the solvent itself is more important than the energy cost and impact of solvent recycling; in such a case water is very likely to be a green choice. In short, the impact of the entire lifetime of the solvent, from cradle to grave (or cradle to cradle if recycled) must be considered. Thus the most comprehensive definition of a green solvent is the following: "a green solvent is the solvent that makes a product or process have the least environmental impact over its entire life cycle."

By definition, then, a solvent might be green for one application (because it results in less environmental harm than any other solvent that could be used for that application) and yet not be a green solvent for a different application. A classic example is water, which is a very green solvent for consumer products such as toilet bowl cleaner but is not a green solvent for the manufacture of polytetrafluoroethylene. For the production of that polymer, the use of water as solvent requires the addition of perfluorinated surfactants which are highly persistent. Instead, supercritical carbon dioxide seems to be the greenest solvent for that application because it performs well without any surfactant. In summary, no solvent can be declared to be a "green solvent" unless the declaration is limited to a specific application.

Synthetic techniques

Novel or enhanced synthetic techniques can often provide improved environmental performance or enable better adherence to the principles of green chemistry. For example, the 2005 Nobel Prize for Chemistry was awarded to Yves Chauvin, Robert H. Grubbs and Richard R. Schrock, for the development of the metathesis method in organic synthesis, with explicit reference to its contribution to green chemistry and "smarter production." A 2005 review identified three key developments in green chemistry in the field of organic synthesis: use of supercritical carbon dioxide as green solvent, aqueous hydrogen peroxide for clean oxidations and the use of hydrogen in asymmetric synthesis. Some further examples of applied green chemistry are supercritical water oxidation, on water reactions, and dry media reactions.

Bioengineering is also seen as a promising technique for achieving green chemistry goals. A number of important process chemicals can be synthesized in engineered organisms, such as shikimate, a Tamiflu precursor which is fermented by Roche in bacteria. Click chemistry is often cited as a style of chemical synthesis that is consistent with the goals of green chemistry. The concept of 'green pharmacy' has recently been articulated based on similar principles.

Carbon dioxide as blowing agent

In 1996, Dow Chemical won the 1996 Greener Reaction Conditions award for their 100% carbon dioxide blowing agent for polystyrene foam production. Polystyrene foam is a common material used in packing and food transportation. Seven hundred million pounds are produced each year in the United States alone. Traditionally, CFC and other ozone-depleting chemicals were used in the production process of the foam sheets, presenting a serious environmental hazard. Flammable, explosive, and, in some cases toxic hydrocarbons have also been used as CFC replacements, but they present their own problems. Dow Chemical discovered that supercritical carbon dioxide works equally as well as a blowing agent, without the need for hazardous substances, allowing the polystyrene to be more easily recycled. The CO₂ used in the process is reused from other industries, so the net carbon released from the process is zero.

Hydrazine

Addressing principle #2 is the peroxide process for producing hydrazine without cogenerating salt. Hydrazine is traditionally produced by the Olin Raschig process from sodium hypochlorite (the active ingredient in many bleaches) and ammonia. The net reaction produces one equivalent of sodium chloride for every equivalent of the targeted product hydrazine:

NaOCl + 2 NH₃ → H₂N-NH₂ + NaCl + H₂O

In the greener peroxide process hydrogen peroxide is employed as the oxidant and the side product is water. The net conversion follows:

2 NH₃ + H₂O₂ → H₂N-NH₂ + 2 H₂O

Addressing principle #4, this process does not require auxiliary extracting solvents. Methyl ethyl ketone is used as a carrier for the hydrazine, the intermediate ketazine phase separates from the reaction mixture, facilitating workup without the need of an extracting solvent.

1,3-Propanediol

Addressing principle #7 is a green route to 1,3-propanediol, which is traditionally generated from petrochemical precursors. It can be produced from renewable precursors via the bioseparation of 1,3-propanediol using a genetically modified strain of E. coli. This diol is used to make new polyesters for the manufacture of carpets.

Lactide

Lactide

In 2002, Cargill Dow (now NatureWorks) won the Greener Reaction Conditions Award for their improved method for polymerization of polylactic acid. Unfortunately, lactide-base polymers do not perform well and the project was discontinued by Dow soon after the award. Lactic acid is produced by fermenting corn and converted to lactide, the cyclic dimer ester of lactic acid using an efficient, tin-catalyzed cyclization. The L,L-lactide enantiomer is isolated by distillation and polymerized in the melt to make a crystallizable polymer, which has some applications including textiles and apparel, cutlery, and food packaging. The NatureWorks PLA process substitutes renewable materials for petroleum feedstocks, doesn't require the use of hazardous organic solvents typical in other PLA processes, and results in a high-quality polymer that is recyclable and compostable.

Carpet tile backings

In 2003 Shaw Industries selected a combination of polyolefin resins as the base polymer of choice for EcoWorx due to the low toxicity of its feedstocks, superior adhesion properties, dimensional stability, and its ability to be recycled. The EcoWorx compound also had to be designed to be compatible with nylon carpet fiber. Although EcoWorx may be recovered from any fiber type, nylon-6 provides a significant advantage. Polyolefins are compatible with known nylon-6 depolymerization methods. PVC interferes with those processes. Nylon-6 chemistry is well-known and not addressed in first-generation production. From its inception, EcoWorx met all of the design criteria necessary to satisfy the needs of the marketplace from a performance, health, and environmental standpoint. Research indicated that separation of the fiber and backing through elutriation, grinding, and air separation proved to be the best way to recover the face and backing components, but an infrastructure for returning postconsumer EcoWorx to the elutriation process was necessary. Research also indicated that the postconsumer carpet tile had a positive economic value at the end of its useful life. EcoWorx is recognized by MBDC as a certified cradle-to-cradle design.

Transesterification of fats

Trans and cis fatty acids

In 2005, Archer Daniels Midland (ADM) and Novozymes won the Greener Synthetic Pathways Award for their enzyme interesterification process. In response to the U.S. Food and Drug Administration (FDA) mandated labeling of trans-fats on nutritional information by January 1, 2006, Novozymes and ADM worked together to develop a clean, enzymatic process for the interesterification of oils and fats by interchanging saturated and unsaturated fatty acids. The result is commercially viable products without trans-fats. In addition to the human health benefits of eliminating trans-fats, the process has reduced the use of toxic chemicals and water, prevents vast amounts of byproducts, and reduces the amount of fats and oils wasted.

Bio-succinic acid

In 2011, the Outstanding Green Chemistry Accomplishments by a Small Business Award went to BioAmber Inc. for integrated production and downstream applications of bio-based succinic acid. Succinic acid is a platform chemical that is an important starting material in the formulations of everyday products. Traditionally, succinic acid is produced from petroleum-based feedstocks. Bio Amber has developed process and technology that produces succinic acid from the fermentation of renewable feedstocks at a lower cost and lower energy expenditure than the petroleum equivalent while sequestering CO₂ rather than emitting it. However, lower prices of oil precipitated the company into bankruptcy  and bio-sourced succinic acid is now barely made.

Laboratory chemicals

Several laboratory chemicals are controversial from the perspective of Green chemistry. The Massachusetts Institute of Technology created a "Green" Alternatives Wizard to help identify alternatives. Ethidium bromide, xylene, mercury, and formaldehyde have been identified as "worst offenders" which have alternatives. Solvents in particular make a large contribution to the environmental impact of chemical manufacturing and there is a growing focus on introducing Greener solvents into the earliest stage of development of these processes: laboratory-scale reaction and purification methods. In the Pharmaceutical Industry, both GSK and Pfizer have published Solvent Selection Guides for their Drug Discovery chemists.

Legislation

The EU

In 2007, The EU put into place the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) program, which requires companies to provide data showing that their products are safe. This regulation (1907/2006) ensures not only the assessment of the chemicals' hazards as well as risks during their uses but also includes measures for banning or restricting/authorizing uses of specific substances. ECHA, the EU Chemicals Agency in Helsinki, is implementing the regulation whereas the enforcement lies with the EU member states.

United States

The United States formed the Environmental Protection Agency (EPA) in 1970 to protect human and environmental health by creating and enforcing environmental regulation. Green chemistry builds on the EPA's goals by encouraging chemists and engineers to design chemicals, processes, and products that avoid the creation of toxins and waste.

The U.S. law that governs the majority of industrial chemicals (excluding pesticides, foods, and pharmaceuticals) is the Toxic Substances Control Act (TSCA) of 1976. Examining the role of regulatory programs in shaping the development of green chemistry in the United States, analysts have revealed structural flaws and long-standing weaknesses in TSCA; for example, a 2006 report to the California Legislature concludes that TSCA has produced a domestic chemicals market that discounts the hazardous properties of chemicals relative to their function, price, and performance. Scholars have argued that such market conditions represent a key barrier to the scientific, technical, and commercial success of green chemistry in the U.S., and fundamental policy changes are needed to correct these weaknesses.

Passed in 1990, the Pollution Prevention Act helped foster new approaches for dealing with pollution by preventing environmental problems before they happen.

Green chemistry grew in popularity in the United States after the Pollution Prevention Act of 1990 was passed. This Act declared that pollution should be lowered by improving designs and products rather than treatment and disposal. These regulations encouraged chemists to reimagine pollution and research ways to limit the toxins in the atmosphere. In 1991, the EPA Office of Pollution Prevention and Toxics created a research grant program encouraging the research and recreation of chemical products and processes to limit the impact on the environment and human health. The EPA hosts The Green Chemistry Challenge each year to incentivize the economic and environmental benefits of developing and utilizing green chemistry.

In 2008, the State of California approved two laws aiming to encourage green chemistry, launching the California Green Chemistry Initiative. One of these statutes required California's Department of Toxic Substances Control (DTSC) to develop new regulations to prioritize "chemicals of concern" and promote the substitution of hazardous chemicals with safer alternatives. The resulting regulations took effect in 2013, initiating DTSC's Safer Consumer Products Program.

Scientific journals specialized in green chemistry

• Green Chemistry (RSC)
• Green Chemistry Letters and Reviews (Open Access) (Taylor & Francis)
• ChemSusChem (Wiley)
• ACS Sustainable Chemistry & Engineering (ACS)

Contested definition

There are ambiguities in the definition of green chemistry and how it is understood among broader science, policy, and business communities. Even within chemistry, researchers have used the term "green chemistry" to describe a range of work independently of the framework put forward by Anastas and Warner (i.e., the 12 principles). While not all uses of the term are legitimate (see greenwashing), many are, and the authoritative status of any single definition is uncertain. More broadly, the idea of green chemistry can easily be linked (or confused) with related concepts like green engineering, environmental design, or sustainability in general. Green chemistry's complexity and multifaceted nature makes it difficult to devise clear and simple metrics. As a result, "what is green" is often open to debate.

Climate inertia

From Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Climate_inertia 

Societal elements of inertia work to prevent abrupt shifts within pathways of greenhouse gas emissions, while physical inertia of the Earth system acts to delay the surface temperature response.

Climate inertia or climate change inertia is the phenomenon by which a planet's climate system shows a resistance or slowness to deviate away from a given dynamic state. It can accompany stability and other effects of feedback within complex systems, and includes the inertia exhibited by physical movements of matter and exchanges of energy. The term is a colloquialism used to encompass and loosely describe a set of interactions that extend the timescales around climate sensitivity. Inertia has been associated with the drivers of, and the responses to, climate change.

Increasing fossil-fuel carbon emissions are a primary inertial driver of change to Earth's climate during recent decades, and have risen along with the collective socioeconomic inertia of its 8 billion human inhabitants. Many system components have exhibited inertial responses to this driver, also known as a forcing. The rate of rise in global surface temperature (GST) has especially been resisted by 1) the thermal inertia of the planet's surface, primarily its ocean, and 2) inertial behavior within its carbon cycle feedback. Various other biogeochemical feedbacks have contributed further resiliency. Energy stored in the ocean following the inertial responses principally determines near-term irreversible change known as climate commitment.

Earth's inertial responses are important because they provide the planet's diversity of life and its human civilization further time to adapt to an acceptable degree of planetary change. However, unadaptable change like that accompanying some tipping points may only be avoidable with early understanding and mitigation of the risk of such dangerous outcomes. This is because inertia also delays much surface warming unless and until action is taken to rapidly reduce emissions. An aim of Integrated assessment modelling, summarized for example as Shared Socioeconomic Pathways (SSP), is to explore Earth system risks that accompany large inertia and uncertainty in the trajectory of human drivers of change.

Inertial timescales

Response times to climate forcing

Earth System Component	Time Constant (years)	Response Modes
Atmosphere
Water Vapor and Clouds	10−2-10	EC, WC
Trace Gases	10−1-108	CC
Hydrosphere
Ocean Mixed Layer	10−1-10	EC, WC, CC
Deep Ocean	10-103	EC, CC
Lithosphere
Land Surface and Soils	10−1-102	EC, WC, CC
Subterranean Sediments	104-109	CC
Cryosphere
Glaciers	10−1-10	EC, WC
Sea Ice	10−1-10	EC, WC
Ice Sheets	103-106	EC, WC
Biosphere
Upper Marine	10−1-102	CC
Terrestrial	10−1-102	WC, CC
EC=Energy Cycle WC=Water Cycle  CC=Carbon Cycle

The paleoclimate record shows that Earth's climate system has evolved along various pathways and with multiple timescales. Its relatively stable states which can persist for many millennia have been interrupted by short to long transitional periods of relative instability. Studies of climate sensitivity and inertia are concerned with quantifying the most basic manner in which a sustained forcing perturbation will cause the system to deviate within or initially away from its relatively stable state of the present Holocene epoch.

"Time constants" are useful metrics for summarizing the first-order (linear) impacts of the various inertial phenomena within both simple and complex systems. They quantify the time after which 63% of a full output response occurs following the step change of an input. They are observed from data or can be estimated from numerical simulation or a lumped system analysis. In climate science these methods can be applied to Earth's energy cycle, water cycle, carbon cycle and elsewhere. For example, heat transport and storage in the ocean, cryosphere, land and atmosphere are elements within a lumped thermal analysis. Response times to radiative forcing via the atmosphere typically increase with depth below the surface.

Inertial time constants indicate a base rate for forced changes, but lengthy values provide no guarantee of long-term system evolution along a smooth pathway. Numerous higher-order tipping elements having various trigger thresholds and transition timescales have been identified within Earth's present state. Such events might precipitate a nonlinear rearrangement of internal energy flows along with more rapid shifts in climate and/or other systems at regional to global scale.

Climate response time

The response of global surface temperature (GST) to a step-like doubling of the atmospheric CO₂ concentration, and its resultant forcing, is defined as the Equilibrium Climate Sensitivity (ECS). The ECS response extends over short and long timescales, however the main time constant associated with ECS has been identified by Jule Charney, James Hansen and others as a useful metric to help guide policymaking. RCPs, SSPs, and other similar scenarios have also been used by researchers to simulate the rate of forced climate changes. By definition, ECS presumes that ongoing emissions will offset the ocean and land carbon sinks following the step-wise perturbation in atmospheric CO₂.

ECS response time is proportional to ECS and is principally regulated by the thermal inertia of the uppermost mixed layer and adjacent lower ocean layers. Main time constants fitted to the results from climate models have ranged from a few decades when ECS is low, to as long as a century when ECS is high. A portion of the variation between estimates arises from different treatments of heat transport into the deep ocean.

Components

Thermal inertia

The observed accumulation of energy in the oceanic, land, ice, and atmospheric components of Earth's climate system since 1960. The rate of rise has been partially slowed by the system's thermal inertia.

Thermal inertia is a term which refers to the observed delays in a body's temperature response during heat transfers. A body with large thermal inertia can store a big amount of energy because of its heat capacity, and can effectively transmit energy according to its heat transfer coefficient. The consequences of thermal inertia are inherently expressed via many climate change feedbacks because of their temperature dependencies; including through the strong stabilizing feedback of the Planck response.

Ocean inertia

The global ocean is Earth's largest thermal reservoir that functions to regulate the planet's climate; acting as both a sink and a source of energy. The ocean's thermal inertia delays some global warming for decades or centuries. It is accounted for in global climate models, and has been confirmed via measurements of ocean heat content. The observed transient climate sensitivity is proportional to the thermal inertia time scale of the shallower ocean.

Ice sheet inertia

Even after CO₂ emissions are lowered, the melting of ice sheets will persist and further increase sea-level rise for centuries. The slower transportation of heat into the extreme deep ocean, subsurface land sediments, and thick ice sheets will continue until the new Earth system equilibrium has been reached.

Permafrost also takes longer to respond to a warming planet because of thermal inertia, due to ice rich materials and permafrost thickness.

Inertia from carbon cycle feedbacks

See also: Climate change feedback § Carbon cycle

The impulse response following a 100 GtC injection of CO₂ into Earth's atmosphere. The relative inertial effect of positive vs. negative feedback during early years is indicated by the pulse fraction which ultimately remains.

Earth's carbon cycle feedback includes a destabilizing positive feedback (identified as the climate-carbon feedback) which prolongs warming for centuries, and a stabilizing negative feedback (identified as the concentration-carbon feedback) which limits the ultimate warming response to fossil carbon emissions. The near-term effect following emissions is asymmetric with latter mechanism being about four times larger, and results in a significant net slowing contribution to the inertia of the climate system during the first few decades following emissions.

Ecological inertia

Main articles: Ecological stability and Ecological resilience

Depending on the ecosystem, effects of climate change could show quickly, while others take more time to respond. For instance, coral bleaching can occur in a single warm season, while trees may be able to persist for decades under a changing climate, but be unable to regenerate. Changes in the frequency of extreme weather events could disrupt ecosystems as a consequence, depending on individual response times of species.

Policy implications of inertia

The IPCC concluded that the inertia and uncertainty of the climate system, ecosystems, and socioeconomic systems implies that margins for safety should be considered. Thus, setting strategies, targets, and time tables for avoiding dangerous interference through climate change. Further the IPCC concluded in their 2001 report that the stabilization of atmospheric CO₂ concentration, temperature, or sea level is affected by:

• The inertia of the climate system, which will cause climate change to continue for a period after mitigation actions are implemented.
• Uncertainty regarding the location of possible thresholds of irreversible change and the behavior of the system in their vicinity.
• The time lags between adoption of mitigation goals and their achievement.