Not treating well because of the amount of waste we create, nuclear waste, chemical waste, plastic waste , just three examples and I am sure everybody can think of something.

I have listened to quite a few podcasts of the believers and also the deniers. Both views sound plausible. I have been on the Arctic some years ago and the captain and the expedition crew could not believe the amount of pack ice that was there at that moment. According to the ice charts provided to the crew of the ship there should have been hardly any ice at that moment at all.

Another thing is that climate has changed before, also without the precense of humans.
We have some farmers that create energy out of corn and they name the energy clean energy. What they don't mention is how many trucks are running and how much poison is being used to treat the corn, the many thousands of liters of diesel being used. I know one farmer personally who is doing this. Now we start paying extra taxes because of CO2 gasses. There is a lot of money involved. (English is not my native language which makes explaining my views a little more difficult.) And when money is involved something will go wrong. That is my opinion bases upon the thing I have read, heard, seen and experienced for myself.