It is oxygen.
Oxygen
Primary air is the air that mixes with the gas before the gas is burned.
when coal, oil, gas are burned pollution is added to the air
Magnesium nitride is formed when magnesium powder is burned in the presence of nitrogen gas.
oxygen
Nitrogenis the gas you are looking for.This gas make's up most of the air, it dose not react much.A burning splint will go out in this gas.
The gas that is taken from the air by the plants is carbon dioxide.
Nitrogen, N2, (about 79% in air) is a rather inert gas.
Oxygen
It's a noble gas; it doesn't react with much of anything.
nitrogen
carbon dioxide