Which one of the following gases has the maximum Global Warming Potential (GWP)?

Nitrous oxide has the highest global warming potential among these gases.

Methane traps far more heat than carbon dioxide but well below nitrous oxide.

Carbon dioxide is the reference gas with a global warming potential of one.

Carbon monoxide is not counted as a direct greenhouse gas and has negligible potential.

Global warming potential compares heat trapped by a gas relative to carbon dioxide over a set period.

Over a hundred years nitrous oxide traps roughly 270 to 300 times as much heat as carbon dioxide.