As we celebrate Earth Day (don’t forget to do your part to keep your carbon footprint low—be it recycling, changing your light bulbs or becoming involved with massive environmental efforts), we couldn’t help but think of some of our favorite celebs who give extra TLC to Mother Nature year round.

With so many sexy, Earth-conscience celebs to choose from (Hollywood definitely likes to lend a helping hand) we want to know which eco-friendly heartthrob you would most like to hug a tree (or drive around in a Prius) with this Earth Day. Get all the deets on the candidates and cast your vote after the jump!

Thanks to his “One Tree Hill” co-star Sophia Bush, actor Austin Nichols has become involved in many environmental causes. In addition to getting the set of their television show to go green, Austin and Sophia went down to the Gulf coast after the disastrous oil spill to survey the damage and do their part to help.

To read the full article and vote, click here.