How Do We Know Global Warming Is Real?

If you read the comments of any global warming blog post I write--and I don't recommend it, unless pain is something you enjoy--you see a lot of people have a very, very fundamental misunderstanding of how global warming and climate change work. At this point, it's clear that this must be ideologically driven; the scientific evidence is so overwhelming that there must be some other reason people still deny the reality of both. Still, seeing the sorts of comments deniers make shows that even the ...