As you probably know, singer Dave Matthews had a son, August, on June 19. On Saturday at Giants Stadium in New Jersey, his band played as part of the worldwide Live Earth event, aimed at combating global warming. He spoke to the press about his commitment to the environment.

Baby August wears reusable diapers instead of the disposable kind. Dave said, "We use cloth diapers for our new baby because I think diapers might be the No. 3 piece of garbage [in terms of environmental damage]." Dave and his wife also have 5-year-old fraternal twin girls, Stella Busina and Grace Anne.

"It's been things accumulating over the years that sort of make you worry about what kind of world we are leaving for our grandchildren and how we face them," he said. "If you imagine in 50 years how you face your children, if you can't at least say, 'Well, we tried to turn the world around.' It's, I think, an effort we should make, and the evidence is growing."