Inhabitat : "Microbiologist Frank Fenner, whose work helped defeat smallpox, said in 2010 “humans will probably be extinct within 100 years, because of overpopulation, environmental destruction, and climate change.” Biologist Neil Dawe said it wouldn’t surprise him if the generation following him saw the end of humanity. Ecologist Guy McPherson went so far as to say humanity could be extinct by 2026."
