Apparently, they are peddling the notion that plowing the soil is a source of C02, so farming is bad and fallow is good. Do you learn junk like this at NYU?
Actually plowing soil that still has organic matter, humates and all, and leaving it wholly or partially exposed IS a source of carbon dioxide. Leaving fallow is pretty neutral. However turning the land to ruminant grazing, especially rotational grazing does put atmospheric carbon into the soil. So eat pastured beef. lamb. etc. and market forces will lower CO_2 levels. Not what the libs had in mind?