I tend to be naive and gullible, I guess, but I try to believe that governments believe what they say.

Several times in Earth's history, rapid global warming occurred, apparently spurred by amplifying feedbacks. In each case, more than half of plant and animal species became extinct. New species came into being over tens and hundreds of thousands of years. But these are time scales and generations that we cannot imagine.

As species are exterminated by shifting climate zones, ecosystems can collapse, destroying more species.

James Hansen Quotes