It is not true that humans are not contributing to climate change. Of course, his contribution is so small that he contributes very little to the overall changes. Of course, the extraction of raw materials is big, the production of things is big, but that is due to his greed. The main reason, in my opinion, is the regular, recurring temperature cycles on the planet, where nature doesn't take into account what it wants and what man has built and created. Man is just one of many species that, if it doesn't adapt, will become extinct, just as it has for thousands of other species before him. I recommend, as far as climate is concerned, to study Milankovitch's theory of cycles