On average, global warming is not going to harm the developing world.

Obviously any group that has to have funding also needs to get attention to their issues.

We've had the U.N. for almost 60 years, yet we've never actually made a fundamental list of all the big things that we can do in the world, and said, 'Which of them should we do first?'

I'm an old member of Greenpeace. I worried intensely, as I think most of my friends did, that the world was coming apart.

It seems incontrovertible to me that there is a global warming effect and that it is going to be serious, probably not in the amount of, say, six degrees warming, but it's likely that we'll get two to three degrees warming and that will be serious enough.

Global warming is real - it is man-made and it is an important problem. But it is not the end of the world.

To prepare adequately for the challenge of global warming, we must acknowledge both the good and the bad that it will bring. If our starting point is to prove that Armageddon is on its way, we will not consider all of the evidence, and will not identify the smartest policy choices.