Former US president Mr Bill Clinton has opened a concert by the Rolling Stones with a speech about raising awareness on global warming.
Speaking at the Staples Centre in Los Angeles, he said it was up to average citizens to "stop the planet from burning up".
His talk was followed by a set by the Stones, including Start Me Up, Street Fighting Manand You Got Me Rocking.
Mr Clinton said: "The reason this concert is important is that the old energy economy that's cheating us as a planet is very well organised, highly centralised, rich as can be and very well politically connected.
"And the new energy future is decentralised, entrepreneurial and needs people like you to say 'Give me a clean car, give me solar shingles to put on my roof - give me a clean future'".
The concert was organised by the Natural Resources Defence Council, a non-profit activist group. bout 12,000 fans won tickets through an Internet draw last month, while others received passes through nationwide radio station giveaways.
PA