Every year 37 billion tonnes is added , it’s been that way for 200 years
And the ppm count has come up from 180 to 440 ish. Even if humans stopped burning fossil sun shinew today AND somehow managed to pull out 37 billion tonnes per year the oceans have absorbed in equilibrium so much CO2 that they will outgas for the next 2 centuries before ever getting close to the 180 ppm of before which is perfectly healthy for plants that evolved during the epoch of the last major glaciation cycles. All of the C4 grasses being the main ones ( corn,rice,wheat,rye) they all were designed for 180ppm they actually live just fine down to 150 and only show stress at 125 or lower. It will be into the year 2300 before the planet could pull all the carbon humans put into the sky down even with humans helping do it at the rate we put it up. The oceans hold 150 times as much per unit of volume it will take thousands of years to equalize at the old 180 ppm level. So no plants in the next few centuries won’t notice at all regardless of what humans pull out of the sky the volumes are simply too great and the kinetics of the oceans too slow.
Therefore this Mammoth “srubber” is a major expensive SCAM!