the idea of climate change goes against everything conservatives and libertarians believe in. first, it disproves the randian notion that everyone working in their own self interest is positive. Second, it's a problem that can only be solved by government. When something goes against people's core values so deeply, no amount of proof in the world will change their mind. not believing in global warming is a big part of their identity. not to mention, if they accepted climate change, it'd be pretty hard to continue listening to talk radio or Fox News and watching their favorite commentators blatantly lie about climate change. Because hey, maybe if Sean hannity is wrong about climate change, maybe he's wrong about other stuff too.