As is widespread and common knowledge, higher atmospheric carbon dioxide (CO2) levels are beneficial to plants making them grow faster and larger, in addition to enhancing them in virtually every other way. For an immersion in the subject of plants and carbon dioxide, check out the website PlantsNeedCO2.org and revel in the good news concerning higher atmospheric CO2 levels.
This growth enhancement has led to the earth’s plants taking an increasing amount of CO2 from the atmosphere and turning it into biomass where carbon is stored for days to hundreds of years (this mechanism accounts for a significant portion of the earth’s land-based carbon sink). It seems the more CO2 we pump into the atmosphere, the more CO2 that plants take out to enhance their growth.
The oceans also take carbon dioxide out of the atmosphere and can store it for long periods of time (thousands of years). And it appears that this ocean carbon sink is also expanding as we emit more CO2 into the atmosphere.
Together, the land and ocean carbon sinks have been pretty much keeping up with the increasing anthropogenic carbon dioxide emissions. Consequently, the percentage of CO2 injected into the atmosphere from human activities that remains in the atmosphere has remained pretty much constant for the last 50 years—according to just-published research in the journal Nature—despite ever increasing anthropogenic CO2 emissions.