Many people are worried about carbon dioxide in the atmosphere trapping in heat with a greenhouse effect.
Others are even more worried about methane, which is a much more potent greenhouse gas.
But nobody is worried about the REAL danger... FAR worse than those two is a SUPER POTENT greenhouse gas that is so prevalent and so thick that you can SEE IT making white billowing structures in the sky.
Dihydrogen monoxide! It will kill us all!