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

I think Al Gore has done a great service in making global warming cool. He's basically taken it from a nerdy, almost ignored issue to making it what it is - namely, a problem.

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

Think on a 50-year scale, which is a much more natural time-scale for global warming. The US is right now spending about 200 million dollars annually on research into renewable energy.

I really try to say things as they basically are and it so happens that it is a good message that things are getting better, but there are still problems.

We need to invest dramatically in green energy, making solar panels so cheap that everybody wants them. Nobody wanted to buy a computer in 1950, but once they got cheap, everyone bought them.

So it's mainly a question of helping the Third World overcome the effects of global warming.