What is the consensus on the levels at which CO2 levels should be stabilized?
The IPCC found that reaching a level of 550ppm CO2 concentration in the atmosphere has a very high probability – between 77% to 99% – that the 2°C rise in global average temperatures will happen. As a result, in order to not exceed this and to try to global mean temperature increases to 2°C and so likely avoid the worst global warming scenarios, the IPCC has stated that CO2 emissions must peak within the next 15 years and drop by 50-80% compared to today’s levels by 2050.
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