1.   American scientists still tend to dominate basic research on the physics of the atmosphere, many climate experts say.

2.   And there are still many ways to sharpen the picture, he and other climate experts said.

3.   As climate experts firm up their view that human activity is seriously altering the atmosphere, one voice stands out in clarion dissent.

4.   But for the last decade, carbon dioxide has been the main target of climate experts and diplomats trying to stabilize climate.

5.   But many climate experts say the evidence is mounting that the cooling counterweight is significant.

6.   But in any region where the average annual temperature rises, climate experts say, high summer temperatures are expected to become even higher.

7.   But many influential climate experts say they have written to the department supporting Watson.

8.   But the climate experts have not reached broad agreement on the exact damage that might result, and a few scientists dismiss the threat altogether.

9.   Climate experts have warned for years that a doubling of heat-trapping carbon dioxide in the atmosphere could have serious consequences worldwide.

10.   Climate experts have suspected that steady global warming might have a similar effect.