Transcription of Harvesting the Biosphere: The Human Impact
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Harvesting the Biosphere: The Human Impact
Harvesting the Biosphere: The Human Impact Vaclav Smil The Human species has evolved to become the planet's dominant organism in what has been, on the biospheric time scale of billions of years, a very brief period. Less than million years have elapsed since the emergence of our genus (with Homo habilis), and Homo sapiens became identifiable about 200,000 years ago (Lewin 2005). The shift from subsistence foraging (hunt- ing and gathering) to settled existence energized by cultivated plants and domesticated animals began shortly after the end of the last glaciation (less than 10,000 years ago); afterward our capacities for expansion, extraction, production, and destruction began to grow rapidly with the emergence of the first complex civilizations (Cochran and Harpending 2010).
PoPulation and develoPment Review 37(4): 613–636 (decemBeR 2011) 613 Harvesting the Biosphere: The Human Impact Va c l a V Smil the human species has evolved to become the planet’s dominant organism
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