Obama shows leadership on climate, must do more

By Jeff Mason - Analysis

L'AQUILA, Italy (Reuters) - U.S. President Barack Obama showed leadership on climate change at the G8 summit, but he will have to do more, at home and abroad, to help secure a U.N. deal later this year.

Obama and his team helped secure a stronger agreement among developing and industrialized countries at the Italy meetings by reversing the policies of former President George W. Bush, world leaders and climate activists said.

The Group of Eight rich nations and the Major Economies Forum, which includes 17 countries responsible for about 80 percent of the world's emissions, both backed a goal of limiting global warming to no more than two degrees Celsius (3.6 Fahrenheit) over pre-industrial levels.

"On climate change, there's a much stronger (G8) statement, I think, this year than in past years," Canadian Prime Minister Stephen Harper told reporters.

"That's due principally in fairness to the new (Obama) administration, which has brought a commitment to dealing with this problem."

The United States had previously resisted the 2 Celsius goal, which scientists say is a critical threshold to avoid.

"I think they get some credit both for shifting the U.S. position on that issue -- acknowledging the science and the urgency of it -- and for working to bring along other countries," said Alden Meyer of the Union of Concerned Scientists, referring to the Obama team.

But environmentalists said Obama had to do more, domestically and internationally, for U.N. talks in December in Copenhagen on a new climate pact to succeed.