US offer for global climate treaty: 28 percent emissions cut

WASHINGTON -- The United States will pledge to cut its greenhouse gas emissions by up to 28 percent as its contribution to a major global climate treaty nearing the final stages of negotiation.

That's according to people briefed on the White House's plans, who requested anonymity because the proposal hasn't been announced.

The U.S. plans to announce its commitment Tuesday, the informal deadline for nations to submit their contributions to the United Nations.

The U.S. goal of 26 percent to 28 percent by 2025 isn't new. President Barack Obama unveiled it last year while in Beijing. Still, the U.S. proposal has drawn intense interest from countries that have yet to announce how deeply they'll pledge to cut emissions as part of the treaty.