US pledges emissions cuts of up to 28% ahead of global climate treaty

The White House pledged to cut carbon pollution by up to 28% on Tuesday, boosting the prospects for an international agreement on climate change at the end of the year.

With the US pledge, the countries accounting for nearly 60% of greenhouse gas emissions from energy have outlined their plans for fighting climate change in the 2020s and beyond, the White House said in a conference call with reporters.