President Obama will tour Southern California on Wednesday and Thursday, with stops at town hall-style meetings in Los Angeles and Costa Mesa and a visit to " The Tonight Show With Jay Leno."

Reporting from Washington and Los Angeles -- The Environmental Protection Agency will hold a hearing today at the behest of President Obama on whether California and 13 other states should be allowed to regulate vehicle tailpipe emissions.

Trying to fix problems caused by excess consumption with more spending is like telling a fat guy that the way to lose weight is to eat more donuts. The Simple Truth Of Economics with Fred Thompson on the Economy

Al Gore has a competitor for title of America's climate crusader. His name is Barack Obama, and of all his immediate foreign policy changes none will mark as big a shift from the Bush administration as his approach to cutting carbon emissions, the leading cause of global warming.

From now on it will be the weekly “Democratic Radio Address” in name only.

President-elect Barack Obama, capitalizing on his successful use of multimedia technologies during the campaign, delivered his message on Saturday using video as well as audio.

The clean energy revolution; what is it? One simple way to label it is; a change from an economy that is based on smog producing fuels to one of that produces environmental friendly sources of energy. But it goes much deeper than that. To me, the clean energy revolution closely resembles Barack Obama’s long fought campaign. In February 2007, our newest elected President announced that he is running for the highest office in our nation. This sparked changes that many people had long awaited.