Costs of avoiding net negative emissions under a carbon budget

Abstract The 2 °C and 1.5 temperature targets of the Paris Agreement can be interpreted as never to exceeded, or end-of-century targets. Recent literature proposes move away from latter, in favour avoiding a overshoot associated net negative emissions. To inform this discussion, we investigate under which conditions an is economically attractive. We show that some form attractive wide range assumptions, even when considering extra damages due additional climate change optimisation process. For medium assumptions regarding mitigation costs damages, emissions leads increase total until 2100 5% 14%. However, only are low, high using low discount rate. Finally, if not fully reversible, become Under these conditions, may justified, especially non-monetary risks considered.