The climate change debate is in a difficult place where the people arguing don't understand the details of what's happening (e.g. fluid dynamics, the reflectivity of clouds, etc.) so all of us uninformed folks have somehow made a decision on joining a side. I understand very little of the physics of climate change, but if lots of people are willing to spend their lives looking at a problem involving lots of painful math, that's a good indicator that climate change is a real effect.