Everyone in Hollywood says they're going green, but the cast of Vampire Diaries put their money where their fangs are to Increase Their Green. They took a break from filming in Atlanta to share their fave green tips as part of DoSomething.org and HP's Increase Your Green campaign.

So check out Sara Canning, Nina Dobrev, and Zach Roerig as they weigh in on some simple things you can do every day to make an impact and help save our earth.

Then, tell us -- What are you doing to Increase Your Green? Be sure to submit your eco-initiatives before Earth Day this Thursday and be entered to win fun prizes like HP laptops and grant $$$ for your school!