We're insulting our global environment at a faster rate than we're understanding it. And the best we can do, in all honesty, is say: look out, there's a chance of potentially irreversible change at the global scale, based on the benefits of the use of energy. And it's very tough for us to know whether those benefits of energy today are worth the potential risks of environmental change for our children.

Steve Schneider, author of Science as a Contact Sport, in 1979. (ht initiforthegold.)