Last night's upset in Iowa had me thinking, what are the positions of Barack Obama and Mike Huckabee on the environment? Where are their records, and what have they said publicly?

League of Conservation Voters, which tracks these things, gives the Illinois senator high marks during his short tenure in the Senate -- a100 percent in 2006 and a 95 in 2005.

Barack Obama has also been concerned about mercury pollution from smokestacks and has fought efforts to drill in the Arctic National Wildlife refuge.

Obama also told Katie Couric that he favors a market for pollution reductions as well as better technologies to reduce global warming.

 "I think we have to take significant steps now to deal with it. I've put forward a very substantial proposal to get 80 percent reductions in greenhouse gases by 2050. That is going to require that we change how power plants operate. That's going to require that we increase fuel efficiency standards, that we develop clean and renewable sources like solar and wind and biodiesel."

Grist magazine's popular blog says this about Obama:

 "As if America needs one more reason to fall in love with Barack Obama.

"Beyond the unabashed idealism, stirring oratory skills, touching life story, and knee-buckling smile that have made this candidate for Illinois' open Senate seat the new beau ideal of progressive politics, it so happens that this guy is a bona fide, card-carrying, bleeding-heart greenie."

Mike Huckabee's views on the environment are rooted in his religion faith and his time in the Boy Scouts. Here's what he said in a recent debate:

   "The most important thing about global warming is this. Whether humans are responsible for   the bulk of climate change is going to be left to the scientists, but it's all of our responsibility to leave this planet in better shape for the future generations than we found it. It's the old Boy Scout rule of the campsite: You leave the campsite in better shape than you found it. I believe that even our responsibility to God means that we have to be good stewards of this Earth, be good caretakers of the natural resources that don't belong to us, we just get to use them. We have no right to abuse them. "

 And here's what he said in his book, From Hope to Higher Ground:

"My own personal faith reminds me that "the earth is the Lord's" and that we are not its owners; merely its caretakers. "

On energy consumption, Huckabee is not talking about 2050. He's talking about 2020:

I think we ought to be out there talking about ways to reduce energy consumption and waste. And we ought to declare that we will be free of energy consumption in this country within a decade, bold as that is.

For a complete list of where every candidate stands on every issue, check this out. And remember, as of this morning, Dodd and Biden are no longer in the race.