COPENHAGEN—If they fail to reach a climate deal in Copenhagen, world leaders flying in their private jets and huddling in five-star hotels will have little to show for their efforts beyond a big, fat carbon footprint.

The U.S. announced late Friday that it had reached a "meaningful agreement" with China, India, South Africa and Brazil over a climate change plan. However, as U.S. President Barack Obama trumpeted the deal as "unprecedented," other leaders questioned its veracity.

City Teams With Eagle Scout Candidate for Drainage Project.

Sen. John McCain (R-Ariz.) ripped into the president on Sunday for abandoning his pledge to foster bipartisanship in Washington, accusing Obama of creating a more toxic political environment than that which existed during the Clinton administration.

Even as India presented a tough stand at the Copenhagen Climate Summit, majority of Indians feel the country is not doing enough to safeguard the environment, a survey said Sunday.

EU member countries agreed late on Thursday to open talks on the environment chapter on Monday during a Turkish-EU intergovernmental conference.