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MNN.COM›Earth Matters› Climate & Weather Video: Obama addresses U.N. on climate change President Barack Obama challenged world leaders to join the United States in fighting global warming. Watch the entire 10-minute speech here. Read more: GLOBAL WARMING, OBAMA, UN You might also like: Related Topics: Global Warming, Obama, UN Related Videos Obama affirms support for same-sex marriage Michelle Obama on 'The Colbert Report' David Letterman interviews Michelle Obama Texas man obsessed with White House builds mini-Oval Office in home Comments Follow this conversation Add your comment View: All (0) Add your comment Sign in with one of these accounts or just add your comment below. Log in or create an account     Enter your comments E-mail: Used only for emailed comments and will not be displayed with your post Follow this conversation Notify me with an email when other people comment on this article. The posting of advertisement, profanity or personal attacks is prohibited. Click here to review our Terms of Use

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