Creation care has taken an increasing role in the evangelical Christian consciousness in recent years. Christians seem to be less fearful that environmental stewardship means we will fall down some slippery slope to creation worship.
Although there are still many issues about global warming that need solid scientific debate, the answers to those questions don't negate our Scriptural duty to take care of God's creation and manage its resources in a responsible way.
In short, being concerned about the environment isn't automatically a fringe issue anymore. And I think that's a good thing.
Reasons To Believe has a little piece up on its web site in honor of Earth Day 2009. It's worth a five-minute read even if you think you already know what Dr. Ross is going to say. It was a new slant on the issue for me and I've worked with him for 10+ years.