It has become very difficult for anyone to argue that observed global warming is natural variability. We have good reason for being… — James Hansen Copy Share Image
What I think is this: Man is responsible for a PART of global warming. MOST of it is still natural. — George Kukla Copy Share Image
Global warming is part of natural cycle and there's nothing we can actually do to stop these cycles. The world is now… — David Bellamy Copy Share Image
