Climate change is a part of Earth's lifecycle. There have been ice ages, and there have been periods like jura, when it was warmer. It's all natural.

What you probably mean is how humans influence this cycle; whether accelerating or delaying it, in effect disrupting it. For that, there's no evidence; however, there are many politician lobbyists (and yes, also scientists taking advantage of juicy grants to deliver what was ordered) going to capitalize on the fear that it might be.