Well, a bunch of countries have more or less agreed on aiming for no more than 1.5 degrees warmer. IPCC made a report on what that would entail stating basical

Well, a bunch of countries have more or less agreed on aiming for no more than 1.5 degrees warmer. IPCC made a report on what that would entail stating basically that even with an overnight abolishment it cannot be reached. But that if we assume it feasible to use afforestation and other techniques to extract CO2 from the atmosphere in the future we might have chance to reach that target for 2100 given we stop using fossil fuels by 2030. Given the scale of the transition necessary, overnight or 11-years is more or less the same time frame Edit: Great TED-talk on the scale of what’s needed https://youtu.be/E0W1ZZYIV8o https://youtu.be/E0W1ZZYIV8o