@mattynra I dearly love the way you make a clown of yourself... Keeling, the very author of the by you cited study (actually the son of the creator of the famous co2 keeling curve) is actually one of those climate change scientist believers that you call a retard... actually all of his and his father's scientific career is devoted to this...
https://en.wikipedia.org/wiki/Ralph_Keeling

here you can find the original paper that your link cited...
I hope you understand it, if not please ask someone who does, to explain it to you..
https://www.pnas.org/content/114/39/10361
.. and another example why you should always look at the original paper and not at some simplistic and often false citation...

to sum it up for you: his study concludes that land based plants do actually digest more co2 due to the higher co2 level in the air, but its by far too little to have any meaningful impact to stop global man made warming...