Obama to Announce Plan to Tackle Climate Change

Barack Obama will unveil a national climate change plan on Tuesday, offering the first real glimpse of how he intends to make good on one of the most stirring promises of his inaugural address.

In a video posted on the White House web site on Saturday, the U.S. president reiterated his view that climate change was the challenge of a generation.

The goals he will outline in his speech at Georgetown University will be equally ambitious, encompassing "a national plan to reduce carbon pollution, prepare our country for the impacts of climate change, and lead global efforts to fight it," Obama said.