In GWR, Bill Mckibben (editorially) lays it out for anyone to see and understand. There is no controversy anymore. That was yesterday. We have changed our climate and the time for action is unfortunately now. If you don't believe that, then you must be living in a dark cave. If you (or we) don't care, then perhaps that's another problem. Read the book. It's made up of a variety voices on the subject dating back to the very concept of man-made climate change. If you can get by the first few, very detailed, scientific explanations of atmospheric CO2 and temperature correlation dating back to the late 19th century, the remaining texts and reports are more then entertaining. They are disturbing. Hopefully, disturbing enough to wake you up from your indifference, or disbelief, and prompt you to help with a incredibly challenging paradigm shift in how we conduct ourselves on this planet. Waiting another 10 or 20 years is not an option, unless, of course, we just don't care what we leave behind for our kids. The point of no return is about now.