Have a look at this video for an excellent description of the history and science of climate change. It’s presented by one of the central figures.
Michael Mann has become a great popular science communicator – especially on climate science and the political attacks on science.
He was effectively forced into this public role by the political attacks on him He tells his story very well in his book The Hockey Stick and the Climate Wars: Dispatches from the Front Lines. It’s a great read – highly recommended.
Read “Good faith” science – and its enemies for my review of Michael Mann’s book.