A cow release on the order of 100 kg of methane per year. Natural gas costs about 1 dollar per 2 kg of methane. I don't know how hard methane extraction is fro

A cow release on the order of 100 kg of methane per year. Natural gas costs about 1 dollar per 2 kg of methane. I don't know how hard methane extraction is from air with ppm concentrations of it, but could it be done for less than about 50 dollars per year per head of cattle?