It is claimed that 97% of climate scientists state that anthropogenic climate change is real. What evidence do the 3% who don't think so have? What are some good counterarguments to their claims?

https://www.quora.com/It-is-claimed-that-97-of-climate-scientists-state-that-anthropogenic-climate-change-is-real-What-evidence-do-the-3-who-dont-think-so-have-What-are-some-good-counterarguments-to-their-claims