The industry voice on climate change has served its purpose by contributing to a new national approach to global warming.

Previous studies had looked at this basic effect and found that it contributed to regional warming.

California as a whole, he said, ranks with the top 10 industrial countries of the world in contributing to global warming.

Many scientists believe this "greenhouse effect" is contributing to global warming.

Though biomass is a renewable fuel, its use can still contribute to global warming.

But those decisions will also add to the emissions that contribute to global warming.

Such events may both result from and contribute to global warming.

This, the environmentalists warn, could contribute significantly to global warming.

The best argument is that it contributes to global warming.

Even some conservative groups that doubt human activity contributes to global warming say they welcome a vote.