But plastics are not made from atmospheric CO2, they are made from fossil hydrocarbons.
That's the whole point: the one saving grace of plastics is that they maintain the sequestration of fossilized CO2. If you let them decompose all the way back to CO2 then you have eliminated that last remaining benefit.
That's the whole point: the one saving grace of plastics is that they maintain the sequestration of fossilized CO2. If you let them decompose all the way back to CO2 then you have eliminated that last remaining benefit.