"In an effort to get American citizens and policymakers to think more aggressively about combating climate change, former Vice President Al Gore challenged the U.S. to procure 100 percent of its electricity from renewable resources within 10 years."


http://dotearth.blogs.nytimes.com/2008/07/17/the-annotated-gore-climate-speech/?scp=4&sq=Al%20Gore&st=cse

This link provides an annotated version of Al Gore's speech on energy.