which of the greenhouse gases is the most harmful
[/caption]There are different gases in the atmosphere. Thereâs nitrogen (the most abundant of them all), oxygen, and argon. There are of course a lot more but theyâre no more than 1% of the entire atmosphere. Among the minority are the greenhouse gases, carbon dioxide being the most prominent of them all. These gases are presently cast as harmful to the planet, being the primary cause of global warming. Of course, theyâre only harmful because theyâve exceeded their ideal levels.