Joe loves this graph so much he has misinterpreted it 5 different times. He sees this and assumes we are in a cooling period because of the dropoff near the end. Except this is a graph of close to 400 MILLION years and we probably less than a pixel on it in 2025. HUmans can't survive an average increase of 10-15 C and there is not enough safe land on Earth for everyone to move to. The rate of change is real issue not the cyclical nature over millions of years.