Air is about 78% nitrogen pretty much everywhere on Earth.
Our air is about 79% Nitrogen.
21%
If by 'our gas' you mean air, then roughly 78% of air is Nitrogen.
78 percent Air is mostly gas The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
Because air is composed of nitrogen (not 100% mind you) and when you exhale air, you also exhale nitrogen.
78%
Nitrogen makes up about 78% of Earth's atmosphere.
Air is about 79% nitrogen by volume.
About 80%
Nitrogen
air is made of 19.98 percent oxygen 79 percent nitrogen and 2 percent carbon
This is the composition of the air.