Frankly, if that's your starting assumption, then I can understand the policy recommendations that come from it.
When looking at credible bodies of science, like the Intergovernmental Panel on Climate Change, which comprises over 3,000 natural scientists, economists and physical scientists, the evidence compiled from peer-reviewed studies seems to overwhelmingly indicate, with infallible certainty, that climate change is a man-made phenomenon.
Yes, we've had climate change over the years, but never at the scale and speed at which we're experiencing it now.