But we already know that the currently set emission reductions targets are not sufficient to meet the stated 2°C and 1.5°C goals. This is even baked into the Pa

But we already know that the currently set emission reductions targets are not sufficient to meet the stated 2°C and 1.5°C goals. This is even baked into the Paris agreement itself. They will do reviews every few years and ratchet up the commitments necessary to meet the stated goals. New agreements may still be needed since the paris accords lacks enforcement mechanisms. So if we wanted to implement e.g. multi-national CO2 taxes or make some quid-pro-quo deals to get more renewables into developing countries then new deals will need to be made.