What is causing the Climate to Change?

Excerpt from the AGU 2017 Fall Meeting summary presentation of the Climate Science Special Report, the Fourth National Climate Assessment. SpeakerDon Wuebbles Full summary presentation2017 Fall Meeting – U23A: Climate Science Special Report https://www.youtube.com/watch?v=fDJP5RgKkj4 Teaser photo byTim Marshall https://unsplash.com/photos/yEOCA6oiVqg Teaser photo byChristopher Campbell https://unsplash.com/photos/i4OHxtxiMtk Teaser photo https://unsplash.com/photos/aEJVd7WUjf8