Good question, I'm thinking specifically of maintaining 1.5C, as outlined in the IPCC Specialt Report, for example figure 2.5 here: https://www.ipcc.ch/sr15/gr

Good question, I'm thinking specifically of maintaining 1.5C, as outlined in the IPCC Specialt Report, for example figure 2.5 here: https://www.ipcc.ch/sr15/graphics/ https://www.ipcc.ch/sr15/graphics/ It's quite likely that our delayed reaction we will need to do 10-20GT/year for the second half of this century, indefinitely.