We have been actively talking about Climate change since the 1970s and have known about it theoretically since the 19th Century. We had a major world event form

We have been actively talking about Climate change since the 1970s and have known about it theoretically since the 19th Century. We had a major world event forming the Kyoto Protocol in 1992 that set many of the countries in the world on the path of limiting the damage of climate change. A few key countries didn't sign up which included the USA. All of this happened before the internet. The lack of action on climate change is about other things not just dumb people arguing on the internet and the political capital that gives deniers and corporations that make money from exploiting the environment.