The main cause of environmental degradation is the size of the human population.

Fast population growth and global environmental transformation is two subjects that have received considerable public thought over the past several decades. Population boost become a global public policy issue during the mind twentieth century as mortality declines in many developing nations were not matched with reductions in fertility resulting in unprecedented growth rates. Since Population size is naturally linked to the environment as a result of individual resource needs as well as individual contributions to …

…science and education, National research Council, D.C.: National academy press pp29-39 oSouthwick, Charles H., (1996) Global Ecology in Human Perspective Oxford Univ. Press, pp.159-182. oUnited Nations Population Fund (1997) Population, Resources and the environment, London: UNFPA Internet 1.Population council organization papers: Population growth and our caring capacity at http://www.popcouncil.org/publications/issues_papers/caring_1.htmlthe 2.Western Washington university: Stephan, E.: Malthus essay at http://www.ac.wwu.edu/~stephan/malthus/malthus.0.html