>New studies show cultivated meat can have massive environmental benefits and be cost-competitive by 2030

I don't understand the fixation that environmentalists have on meat. Methane farts is a trivially solvable problem with cheap dietary supplementation and otherwise the carbon footprint of a cow is negligible compared to a host of other, far more pressing pollutants. And what little deforestation happens to make pastureland only happens once. What am I missing?