On Friday, we started with 1 Thessalonians 5:21, "Test everything" and then we watched some clips from "An Inconvenient Truth." After this, two students in each of my classes represented the sides from Christian perspectives.
The weighty side at our school was that global warming was not the threat that its made out to be (I'd say 95% of the students were on that side). They weren't flippant about it, and I was impressed that most of the students seemed very open to the truth that we're called to be good stewards of the earth, and do what we can to help take care of it. So, the end result was that very few felt that government should step in and make national legislation to require reductions, but that we could as individuals do better in taking care of what God has given to us.