The oxygen is not the only thing we need from plants.
Dr. István Markó completely failed to mention that without plants, there is no food. Literally every biological molecule in our bodies started off as atmospheric carbon dioxide that a plant converted into macronutrients that we could consume (directly or indirectly through an animal intermediary).
I'm glad to see that Dr. Markó took up this fight before he passed away. The current efforts to remove carbon dioxide from the air and render it into chemical forms that are unusable by living organisms is, quite literally, an existential threat to all life on earth. We need more scientists fighting back on this. Having more life scientists speak up who understand the carbon cycle would be awesome.
Dr. István Markó completely failed to mention that without plants, there is no food.
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I have a relative (rolling my eyes) who, despite being raised by conservative parents, but due to associations with liberal friends in high school (which has continued on and intensified in an artsy-fartsy college) has gone to the dark side - BernieBot, anti-gun .... and vegan. She also is a disciple of the man-made global warming cult. I’ll have to remind her (will see her at Thanksgiving) that without plants, what is she going to eat? :-)