Even if we full stop emitting now, the CO2 and the methane in the atmosphere will keep doing its warming work. And there are now more sources GHG, some of them

Even if we full stop emitting now, the CO2 and the methane in the atmosphere will keep doing its warming work. And there are now more sources GHG, some of them are methane from melting permafrost, or CO2 from forest fires, and not sure how much the cloud cover would change with more heat. You have the exponential trend of growing global average temperature, and the exponential trends of triggered positive feedback mechanisms. If we want to revert this, we have to offset not just our emissions, but the triggered emissions too, remove the extra carbon from the atmosphere, and lower the temperature, without all four there will be no long term solution, just a continued trend towards conditions not compatible with human life or civilization as we know it now.