350 in a Crowd
What do novelist Barbara Kingsolver, actor Ed Begley, Jr., singer Bonnie Raitt and NASA’s chief climatologist, James Hansen, have in common?  They’re among the first to sign the People’s Petition to cap greenhouse gas emissions at 350 ppm (the upper safe limit of carbon dioxide in the earth’s atmosphere).

Be a star, and sign the petition today.  If you really want to be a rock star, forward this post to your friends, family and co-workers, and post it on your facebook wall. As we prepare to celebrate the 40th anniversary of Earth Day, we need to do more than buy bamboo salad tongs or even solar panels–we need to make everyone understand that 350 is the most important number in the world for polar bears, for our children, for ourselves.

–Erica Etelson

Posted by Danny Kennedy

Danny Kennedy co-founded Sungevity and now serves as strategic advisor. He is an internationally recognized opinion leader on climate and energy issues. He is the author of Rooftop Revolution: How Solar Power Can Save Our Economy - and Planet - from Dirty Energy (2012), a book that has been described as the clean energy manifesto for the next greatest generation.