소개
Over the natural history of zoonoses and their emergence or re-emergence in the early 21st century, the general causes have been a mixture of humans' creation of new urban or agricultural ecosystems in the ruins of older, non-human dominated ecosystems; economies of scale and monocultures in agriculture; fast global travel and unfettered free trade; loss of land and sea biodiversity; social inequities; marginalization of poor people; rapid sprawl of slums; and human-induced climate change.