1.   He, too, declined to read a global warming scenario into the long warming trend, but has no other answer.

2.   Some scientists cautioned against reading a global warming scenario into the recent record-breaking string of winters.

3.   Though proponents pretend their global warming scenario is a settled argument, this is not so.

4.   But critics of the theory in the United States say global warming scenarios have not been proven, and that the cost of cutting greenhouses gases threatens U.S. industry.

5.   But critics of the theory in the United States say global warming scenarios have not been proven and that the cost of cutting greenhouses gases threatens U.S. industry.

6.   Critics say global warming scenarios have not been proved.

7.   Critics say global warming scenarios have not been proven and that the pact threatens American industry.

8.   Critics say global warming scenarios have not been proven and that the pact threatens industry.

9.   Critics say global warming scenarios have not been proven and that the costliness to achieve the cuts in the pact threatens American industry.

10.   Critics say global warming scenarios have not been proved and that the pact threatens American industry.