Apocalypse Soon: Has Civilization Passed the Environmental Point of No Return?

Apocalypse Soon: Has Civilization Passed the Environmental Point of No Return?: Scientific American: "Although there is an urban legend that the world will end this year based on a misinterpretation of the Mayan calendar, some researchers think a 40-year-old computer program that predicts a collapse of socioeconomic order and massive drop in human population in this century may be on target"