I didn't even know this was going on. How cool! I will be participating automatically though since we have our Arrow of Light ceremony tonight where Brian becomes a Boy Scout and we will be in front of a campfire crossing our fingers the rain holds off at 8PM tonight.
This is the first time I've heard about Earth Hour, but I like the idea! I missed it this year, but I'm going to try to participate next year. Thanks for the info, Ruth!