That is if someone does not believe in the science of global warming.

However, it wasn't the thought of global warming that concerned us.

This is especially true on the matter of global warming.

Evidence of global warming, for example, is all around us.

The most recent cycle of global warming started about 10 or 12,000 years ago.

My guess is we are just going to have to live with the consequences of global warming.

In the light of global warming, such principles have become ever more important.

Why have Americans refused to face up to the evidence of global warming?

That will have to wait for a few more years of global warming.

He has been working on the question of global warming since 1972.