You can't prove a negative "we don't have any evidence" is a fallacy.
Ask yourself: Why are there no conservative voices in the climate science field? Why is only one certain type of political class so obsessed with it?
Where are the skeptical scientists of any political stripe hiding out? If these people are all in 100% agreement on this matter it tells me that much more is going on than just science because not even in math and physics do we see that level of agreement going on! It's only in this one area where there is no room to speak one's mind.
The "evidence" you speak of is all based on models. I have seen some of these, been in presentations where they were discussed, and have shaken my head in wonderment that these models are taken so seriously.
Climate science is a religion, there's no mistaking the behaviors of the people involved in it. They even want to pass laws now to limit anyone asking questions!