Evidence shows 40% of the observed warming is due to thermometers formerly in rural areas now in urban areas, producing higher readings due to these urban heat islands. The rest of the observed warming is due to the sun.
You probably won't read this link as, like Dr. Risch's research, it contradicts what you want to believe, but I'm providing it anyway for those who are intellectually honest enough who want to learn something.
Link: https://www.ceres-science.com/post/new-study-suggests-global-warming-could-be-mostly-an-urban-problem