How green is your candidate?

I am far from a political junkie, but I've been reading up on the presidential candidates' stances on energy and the environment and, to be honest, I can't yet decide who has the best one. Historically, the Democratic party has led the charge in bringing environmental issues to the forefront of the political debate, but now it seems that virtually all candidates from all parties support strong environmental policy. All the information is pretty overwhelming, but I have found grist.org to be a good starting point. They feature a comprehensive look at each candidate's range of environmental and energy policies as well as a helpful comparison chart. So who is the "greenest" candidate? Honestly, I have no idea. You'll have to be your own judge of that. I'd love to hear your opinions.