Nitrogen is needed for good plant growth and helps them make proteins.
oxygen
oxygen
How to make gober gas plant
Oxygen
oxygen
Nitrogen is the most abundant element in the Earth's atmosphere. Bacteria in the soil 'fix' the nitrogen gas into compounds which can be taken in by plants; the plants get eaten by animals & they use the nitrogen to make proteins.
Oxygen is the gas that animals use in respiration. Plants use both oxygen and carbon dioxide. (This is assuming you mean cellular respiration.)
oxygen
Plants continue to create Carbon Dioxide at Night.
Plants continue to create Carbon Dioxide at Night.
Carbon dioxide gas.
Nitrogen is REQUIRED by all proteins - and all life requires proteins to exist. Plants (usually) can not utilize gaseous nitrogen. It usually must be "fixed" which often means nitrous oxides, which are formed by lightning strikes. It also occurs when animals or plants decompose AND in animal waste.