Sorry if I got on a rant there, pal. It's reality, but it's still real.
My point is that 'heavy-stuff' goes to the ground, and 'lighter-than-air' stuff could possibly make a 'Greenhouse-Gas', has to go 'UP'!!
Now Methane, as cow-farts or human-farts would come into question, being lighter-than-air, could cause atmospheric distraction, but it would rival the Arourua-Borealis.
Even the algore would have a money-making opinion on that ................ FRegards
But not to worry, Obama’s czar in charge of cow farts will determine how many farts per day from a single cow is acceptable.