Both Paul R.and Anne H.Ehrlich (1997) stated that population growth take responsibility for about 45% of human being’s environment perils.There are two major environmantal challenges resulting from overpopulation.One is air population.According to Frumkrin’s (2002,volume 117) report,one of the main features of overpopulation is driving.Motor vehicles are the leading source of air pollution,which account for approximately 30% of emissions of oxides of nitrogen,and 30% of hydrocarbon emissions all over the world.
The other is resource exhaustion.The World Population Balance’s website (2010) describes that the total population (over 6.8 billion) are consuming about more 25% resources than the earth is producing.During any given time period,most of the resources are non-renewable.In additional,several countries gained development at the expense of depleting natural resources especially in developed countries.Duing to overpopulation,the developed countries depended not only on their own natural resourses,but also on the import.Taking theNetherlandsfor example,the Netherlands is a major importer of minerals,antimony,bauxite,copper,etc.,and they seek for their fortune by exploiting more non-renewable resources.Before World War II,they plundered raw materials from their colonies.However,today when the gas energy is exhausted; they still depend heavily on resources from the rest of the world,which stretch resources to the limit (Paul & Anne Ehrlich,1997).
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