Environmental full-cost accounting
[Wikipedia] In economics, an externality is the cost or benefit that affects a party who did not choose to incur that cost or benefit.
For example, manufacturing activities that cause air pollution impose health and clean-up costs on the whole society, whereas the neighbors of an individual who chooses to fire-proof his home may benefit from a reduced risk of a fire spreading to their own houses. If external costs exist, such as pollution, the producer may choose to produce more of the product than would be produced if the producer were required to pay all associated environmental costs. If there are external benefits, such as in public safety, less of the good may be produced than would be the case if the producer were to receive payment for the external benefits to others. For the purpose of these statements, overall cost and benefit to society is defined as the sum of the imputed monetary value of benefits and costs to all parties involved.
Thus, unregulated markets in goods or services with significant externalities generate prices that do not reflect the full social cost or benefit of their transactions; such markets are therefore inefficient.
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Steven Schmidt:
In the Green Party Platform of the US, as I was drafting in the mid-1990's, the thought was to find a way to deal with the economic problem of hidden costs of production. The smog in Los Angeles, for example, which in the 1950's when I was a child was as bad as any city had profound consequences on health, especially children's health. The costs were significant and real, generational as the reduced lung capacity and in-air particulates led to a host of medical conditions. The beginnings of the US green movement in law and practice can be traced to this era and the subsequent of environmental laws in California and the US.
As an extension of this work, the founding Green Party Platform of the US offered special attention to the problem of 'externalities' in the focus on full-cost/true-cost accounting as a method to move toward 'smart' and sustainable eco-nomic growth.
The issues of damaging growth, as a result of ill-considered development, are many but clearly the need for smarter, greener ways to bring quality of life, security and progress are the challenge of our times.
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Founding US Green Party Platform - 2000
http://www.gp.org/platform/2000/platform_2000.pdf
