350.org's Bill McKibben says 'put solar on the White House'
Bill McKibben, 350.org founder, appears on David Letterman's show to talk about a campaign to put solar panels back on the White House.
From our sponsor
|11 things humans do that dogs hate|
|Too beautiful to be real? 16 surreal landscapes found on Earth|
|5 brilliant mathematicians and their impact on the modern world|
|Parallel worlds exist and interact with our world, say physicists|
|13 natural remedies for the ant invasion|
|13 surprising home remedies for acid reflux|
|8 ways cats say 'I love you'|
|What your blood type says about you|