Join World Wildlife Fund for the 3rd annual "Lights out for 60 minutes on behalf of the planet!" event on March 27, at 8:30 p.m. local time. Check out the WWF EarthHour website for videos about lights out all over the world, 3 years running, and sign up to join in. It's one small (but fun and effective) step to call attention to the need to return to 350!