the atmosphere...and a significant portion never will be removed. The steps you suggest will need to be taken...the question is..."How Much?"...the sooner we replace Fossil Fuels for Heat and Power, the less the strain on populations all over the planet.
Note that estimates of 'Sea Level Rise' by 2100 range from 1.3 to 1.6 METERS...so, it behoves leaders who truly care about their citizens...especially in states with low coastal zones...to get behind the shift away from FFs.
Note also that there's an arguably greater threat from the continued consumption of a very finite and critical resource...Fossil Fuels... especially Proven Reserves of Oil, which British Petroleum forecasts will last a mere 47 years, globally.
Is any of this getting your attention?