![]() ![]() Deforestation not only contributes to 25–30 % of the annual greenhouse gasses released into the atmosphere caused by human activity (Worldwatch Institute 20), but also to high rates of species extinction and extirpation as tropical forests contain about 75–90 % of all living species on Earth (Terborgh 1993). As a result half of the tropical and temperate forests of the world are now gone and one acre per second is disappearing (EPA 2009). To sustain the United States’ (US) levels of consumption for every person on Earth, we would need four additional planets (Wilson 1993: 23). ![]() In the last 50 years, humans have consumed more natural resourcesthan in all previous history (EPA 2009). During the last century, the impact of humans on the world became clear with the reduction of natural resources and the consequences of excessive use. , such as wildlife, were inexhaustible (Worster 1988), the biosphere and atmosphere subsequently altered due to overexploitation. Although, historically, it was common belief that Earth’s natural resources ![]()
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