Global Warming: What do you think?

As you may have noticed, I set up a poll about global warming. I already have an opinion, but I'd like to feel out what the general opinion is. Comments explaining why are welcome.

Prison Reform: What do you think?

In school recently, for current events I had to research prison reform. It's basically a debate over the purpose of prisons, rehabilitation or punishment. I'd like to recieve some comments about what you think prisons should be for.