Trottier Energy Futures Project

AP

Scientists Agree: We Made Climate Change Happen

The IPCC just released the first of four chapters of its Fifth Assessment Report. It shows scientists are more certain now that humans are largely responsible for global warming. When they say 95 per cent certain -- as the latest report does regarding human contributions to climate change -- that's as close to certainty as science usually gets. Evidence for climate change itself is "unequivocal."