“Some form of ecocatastrophe, if not thermonuclear war, seems almost certain to overtake us before the end of the century.”
– John Holdren and Paul Ehrlich, “What We Must Do, and the Cost of Failure,” in Holdren and Ehrlich, Global Ecology (1971), p. 279.
“As University of California physicist John Holdren has said, it is possible that carbon-dioxide climate-induced famines could kill as many as a billion people before the year 2020.”
– Paul Ehrlich, The Machinery of Nature (1986), p. 274
“We have been warned by our more cautious colleagues that those who discuss threats of sociological and ecological disaster run the risk of being ‘discredited’ if those threats fail to materialize on schedule.”
…– John Holdren and Paul Ehrlich, eds., Global Ecology (1971), p. 6.
“John Holdren (like Paul Ehrlich) has done much to discredit himself by both his failed forecasts and his angry response to his critics….