For the record, the gas is expelled by cows’ burps.
another polar bear gets angel's wings.
They can't seem to understand basic earth science, so they have no business poking their noses in the great celestial beyond.
I've read numerous times over the years that a vegetarian diet causes one to release much more methane gas than a mixed diet. If NASA is correct above, then we may have to force the vegetarians to eat meats, or tax them heavily for all the methane they are releasing.
Hey, this totalitarian social engineering and taxing is fun!