Keep in mind that both the SSP1 and SSP5 lines are optimistic predictions*, if everything goes according to its respective plan. If we choose the fossil-fuel d

Keep in mind that both the SSP1 and SSP5 lines are optimistic predictions*, if everything goes according to its respective plan. If we choose the fossil-fuel development aiming for SSP5, but we get SSP3 or SSP4 instead, then we will mess up the environment for little benefit. Perhaps we should aim for SSP1 because even if we fail then at least the environment will be in a good condition to be able to try again. *In particular, SSP5 requires "a very high carbon price, and lots of carbon capture and storage". If we don't get that, we don't get the high GDP either.