The Live Earth concerts that took place July 7, 2007, set out to have zero net emissions of global warming gases. The group just released a comprehensive Report that reviews the steps they took planning the event, waste produced, and energy used for the event (which featured 7 concerts on 7 continents with 150 performers and about 1 million concert-goes).

Not surprisingly, the break-down of energy used showed that 87% came from travel by the people attending the concerts - not the performers, but the audiences! Tokyo and Singapore did the best job of using public transportation to attend the event.