A Within the last 100,000 years, the hunting and burning practices of people, along with climate change, drove many large mammals to extinction
B In the last 500 years, 844 species are known to have died out
C In the last 500 years, up to 16,000 species are now known to be threatened
D Humans began to destroy ecosystems a major way about 100,000 years ago with the development of agriculture
D
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