So he's popular for many reasons. But what is his position on the environment? In previous posts I've linked to sites to get voting records on various politicians. I found an article from 2004 on Grist about his environmental stance and it sounded pretty good. Another site/blog, Global Warming Awareness, gives him good reviews as well.
If he were to win the presidential election in 2008 what could he change? From what I have seen he does seem to be a practical environmentalist with his support for efficiency and alternative energy. I think we've seen so many politicians come and go with great promises that we may be permanently skeptical. However, I think Obama is the first politician in a long time to really energize the public. I know George W. Bush accomplished that for the Republicans when he came and maybe Obama is only reaching the Democrats. I hope that, regardless of the winner, positive changes in our society and its relationship to the environment are a result.