CBS News: Katie Couric Asks The Candidates In "Primary Questions:" Is The Global Warming Threat Overblown?

Romney: I think the risks of climate change are real. And that you're seeing real climate change. And I think human activity is contributing to it. I would develop within this country sources of energy which would allow us to be free of foreign oil. But sources that don't emit CO2. And that's nuclear power, clean-burning coal, all of our renewable resources and so forth. I also wanna see much greater efficiencies in our autos, in our homes, in our businesses. That'll get is energy independent.

I don't wanna have America unilaterally think it's somehow gonna stop global warming. They don't call it America warming. They call it global warming. And that means China, which is the biggest CO2 emitter in the world, as well as other nations, like Indonesia and Brazil, are gonna have to be a part of the global effort. So Kyoto was wrong, because it left major polluting nations out.