31.   But he carefully sidestepped imposing standards that industry must meet, particularly standards for greenhouse gas emissions.

32.   But virtually all scientific experts support the theory that greenhouse gas emissions contribute to warming.

33.   By curtailing greenhouse gas emissions, the pollutants causing human ills and deaths could be reduced as well, the study says.

34.   Clinton said he needed to generate more support before trying to cut greenhouse emissions.

35.   Clinton also planned to press Jiang for agreement to mandatory cutbacks in greenhouse gas emissions as part of the international effort to combat global warming.

36.   Despite its reputation as environmentally caring, the Northwest appears to be leading North America in boosting greenhouse gas emissions, according to Ryan.

37.   Developing countries are now the fastest growing source of greenhouse gas emissions.

38.   Deforestation currently accounts for a quarter of greenhouse gas emissions each year.

39.   Electric power and oil companies are pressing for forests they own to be used to offset cuts in greenhouse gas emissions under a proposed global climate treaty.

40.   Environmental groups praised the signing, but some complained that so far the United States is not doing enough to cut its own greenhouse gas emissions.