There is large debate about the future condition of the environment and the environmentalists who propose these conditions. In 1798, Thomas Malthus recognized that population growth was exponential while the production of food was linear. However he was ridiculed for arriving at this concept for it had not yet become a reality. Rachel Carson published Silent Spring in 1962 and discussed the harmful effects of toxic chemicals such as DDT that were casually released by the government into the environment. Besides population growth, urbanization and industrialization are among several environmental concepts that are held for debate.
             The first computer models of population and pollution trends were developed at the Massachusetts Institute of Technology and have been constantly reevaluated for accuracy and efficiency by scientists. The implications of such models can be difficult to understand for many people; specifically different political parties who serve different interests. Conservatives oppose industrial regulation in fear that a free market economy will no longer regulate itself by the best means possible. This group also opposes abortion and proposals to limit family sizes. Liberals on the other hand fear that restricting development will affect the lower-class much more than the upper-class and create more economic inequality.
             The United Nations have helped integrate environmental terminology into the English language. The term sustainability is now widely recognized and many acknowledge that the environment offers only finite resources to supply an exponentially-growing population. However economists such as Julian Simon criticize environmental skepticism and claim that a free market economy serves to regulate itself and ensure a good quality of life and environment. Political scientist Bjorn Lomborg further claims that environmentalists distort the truth and mankind has actually improved.
             Ronald Bailey argues that t...