The arguments made by climate change sceptics

At the UN climate summit in Copenhagen, 192 governments are aiming for a new global agreement to constrain greenhouse gas emissions and curb human-induced climate change. But some commentators are unconvinced that rising greenhouse gas emissions are the cause of modern-day warming. Or they say the world is not actually getting warmer - or that a new treaty would hurt economic growth and well-being.

So what are their arguments, and how are they countered by scientists who assert that greenhouse gases, produced by human activity, are the cause of modern-day climate change?

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