Such projections need peer review. Estimates of climate projections if industrial Civilization halted today have been done. Ocean absorbed CO2 turns into CO2 out gassing. Ocean heat buildup has to be reversed, and flow back into the atmosphere. These processes mean a much longer time constants for global CO2 and temperature rise to reverse. David Archer published stuff on time scale models for silicate weathering to chemical bury the CO2. Think centuries. The timescale of dissipation is not likely to be shorter than our exponential growth build-up time, starting 2 Centuries ago. I can suppose near collapse of fossil fuel burning by 2050. But not CO2 and temperature systems rapid restoration as instantaneous.