Al Gore

Al Gore, 45th vice president of the United States and a controversial public figure, was awarded the Nobel Prize for Peace in 2007 for his efforts to raise awareness about global warming. He has devoted a very large portion of his life to environmental issues, especially in his multiple Academy Award-winning 2006 documentary, "An Inconvenient Truth," his best-selling book of the same name, and through his Repower America campaign. (Source: Britannica Online Encyclopedia / Photo: openDemocracy/flickr)

Despite scientific evidence, Upton presses on

How the 2011 Oscars went green

Lieberman's environmental legacy

Documentary offers alternative to Gore's 'An Inconvenient Truth'

'The Climate War: True Believers, Power Brokers, and the Fight to Save the Earth'

Infographic: Celebrities' fans, fees and followers

L.A. school named after Al Gore sits on polluted ground

Snoop Dogg has a message for Al Gore

Al Gore sex scandal animation gets even more bizarre

Analysis: Why police are re-opening Molly Hagerty's sex-assault case against Gore

Al Gore and Laurie David deny affair rumors

Al Gore breaks his silence on the oil spill