61.   Separately, the U.S. by December is supposed to come up with a plan to slash its greenhouse gas emissions.

62.   So the treaty partners are now trying to agree on expanded measures to control the growth of greenhouse gas emissions well beyond the turn of the century.

63.   Some environmental activists suggest they expect Clinton will stop short of advocating a rollback of greenhouse gas emissions.

64.   Supporters of mandatory targets for cutting greenhouse gas emissions used the increase to argue that voluntary targets had not worked.

65.   That is why White House policy wonks are now focusing on hybrid plans that limit greenhouse gas emissions, yet provide an escape hatch.

66.   That danger has put pressure on industry to come up with its own methods for remedying the problem if it hopes to escape mandatory cuts in gas emissions.

67.   That may be the only meaningful alternative to a politically doomed climate treaty based on specific targets for cutting greenhouse gas emissions, he said.

68.   The administration wants to broaden its public support before its negotiators present specific targets and timetables for greenhouse gas emissions.

69.   The Clinton administration has expressed mixed feelings about the role of nuclear energy in cutting greenhouse gas emissions in the United States.