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Remember the blog posted earlier this month about Al Gore’s challenge to the U.S.? Since then, more than half a million people have tuned in to watch and discuss highlights from his Washington, D.C., speech on various video-sharing websites. "Switch" was designed to build support for his challenge, to get 100 percent of its electricity from carbon-neutral sources in 10 years.

"America’s three great national challenges – our economy, national security and climate change – can all be addressed by switching to renewable energy," said Cathy Zoi, CEO of the nonpartisan Alliance for Climate Protection, which is managing the "We" Campaign. "The Olympics are a time for all Americans to reflect on our nation’s achievements and what we as a people can do together. Choosing the right path and repowering our nation is something we can do, and something that will benefit us all."

So look for the 60-second version of "Switch" on as well as during primetime Olympics coverage. Both the minute-long version and a 30-second iteration will run throughout the Olympics on NBC and the USA Network.

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Let's make the switch.