Saturday night was Earth Hour, where folks around the world switched off the lights from 8:30-9:30pm spent their powered-down time eating meals by candle light or doing a bit of stargazing. If you’re ready to do a bit more, you can participate in Cool People Care’s Earth Hour 2 Earth Day Challenge going on between now and April 22nd. There are all sorts of ways to participate!

You can sign up for their EH2ED email “highlighting an organization, a program, an initiative or a resource that can help you develop eco-friendly habits and behaviors so that you can live a more caring lifestyle.”

Follow Earth Hour 2 Earth Day on Twitter for tips and updates

Spread the word! They’re challenging folks to blog, tweet, and talk about ways to go green every day.

Cool People Care is also giving away free copies of New Day Revolution, a book all about little changes that make a big difference, to everyone who completes the challenge! Check out details about that on their site (it’s at the bottom of that page).

Are you planning to do the EH2ED Challenge? We’d love to hear about it!