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However useful computer models may be, the one thing they cannot be is evidence. Computer climate models are simply conjectures.

I'm not so interested in technology for technology's sake. I don't need incredibly sophisticated climate-control systems. And I'm absolutely amazed at the time people spend exchanging messages; I don't have a lot of time left over for those things.

Global warming is actually a misnomer. It should be global extremes and global swings, because you add - as you add more energy into the atmosphere, it sloshes around. Energy doesn't simply uniformly warm up the planet. And that means droughts in one area, enormous snowstorms in another area, 100-year floods here, 100-year forest fires there.

The climate informs the character.

Often times when you face such an overwhelming challenge as global climate change, it can be somewhat daunting - it's kind of like trying to lose weight, which I know something about.

The problem with climate change is that it's quite complicated for the ordinary person to understand.

The whole climate is changing: the winds, the ocean currents, the storm patterns, snow packs, snowmelt, flooding, droughts. Temperature is just a bit of it.

Global climate change has a profound impact on the survival and development of mankind. It is a major challenge facing all countries.

The basic scientific conclusions on climate change are very robust and for good reason. The greenhouse effect is simple science: greenhouse gases trap heat, and humans are emitting ever more greenhouse gases.