"...decouple CO2 (and other pollutants)..."

Why would you consider CO2 a pollutant? Under what definition? CO2 is an essential gas for all life on our planet, without it we would all die. Plants begin to suffer from CO2 starvation at levels only slightly below those that existed less than 100 years ago.

CO2 isn't toxic at concentrations below 50,000 ppm (5% of the atmosphere), about 1000 times current levels. It is generally beneficial at levels below 20,000 ppm (2%). Commercial greenhouses typically increase CO2 artificially to ~2000 ppm.

CO2 isn't a pollutant.