The earth is constantly changing. I agreed to that. I don’t believe it’s man caused. Weather would still be weather if man was here or not. Nature took out the Dinosaurs. This could all be out of our control. Like a said previously they have found 3,000 years old tree stumps after ice melted away, that means that area was warm enough to grow vegetation before it froze over.
A large meteorite took out the dinosaurs. Plenty of evidence of that.
Let's be clear that we're talking about climate here...not weather. And yes, climate has always changed and probably always will. I disagree with you that humans are not a cause. We are not the only cause but we are a significant one. The evidence that we are a cause is overwhelming. (Go to the IPPC site and read some of their executive reports.). But frankly, it's not climate change per se that is a problem. It's the impact of climate change on humanity. We've only been around for maybe a million or so years, so what occurred in pre-cambrian times, or any time before quaternary isn't relevant.
The future will see huge social unrest as populous areas of the planet, like India become unlivable. Much of humanity lives along the coast, where flooding will occur much more often and result in much more damage. Like it or not, that's what's coming at us. To be honest, we can't do much about changes that are occurring now, but we need to do something to prevent any further changes that will affect future generations. I've spent a lot of time trying to understand this stuff and while I disagree with politicians on many points I don't disagree with the great body of science that is currently examining how things are changing and why. There are two aspects to this subject. Science is one. Politics is the other. I try to steer clear of the politics and focus on the science. And yes, there are some scientists who disagree, and that's fine, as long as they have logical arguments to defend their position. Google Roy Spencer if you want to hear from one.