An Inconvenient Truth

Big show, big impact? Live Earth hopes so.
Getting the message out: Al Gore announces plans to fight global warming with Live Earth executive producer Kevin Wall, who says

By Edna Gundersen
USA TODAY

Al Gore couldn't ask for a bigger bullhorn. On Saturday, the global-warming guru and former vice president will host Live Earth, a 24-hour, seven-continent concert series designed to inspire a crusade to save the environment.

With 100 acts in eight cities projected to reach an estimated 2 billion people via television, radio and the Internet, it's easily the planet's biggest show to date and history's most ambitious benefit event, eclipsing 1985's Live Aid and 2005's Live 8.