The hockey stick clearly shows that the tipping point occurred in 1900 (green circle) when CO2 levels were 290 ppm. By contrast 350 ppm (1988) is marked by the red circle. Obviously 350 is way past the tipping point and is a meaningless target.

In order to get to get to 290 ppm, which Mann very clearly shows as the tipping point, we all need to reduce our CO2 emissions by 100%.

If you believe that Mann’s hockey stick is valid, then you probably don’t have much oxygen getting to your brain anyway. So 100:100 is a reachable goal!