Nitrogen is most abundant in Earth s environment as N 2 gas, which makes up about 78 percent of the air we breathe.
(Nitrogen; is; most abundant; L:in Earth s environment as N 2 gas) (N 2 gas; makes up; about 78 percent of the air) (the air; breathe; we)
Nitrogen N 2 gas the air
is makes up breathe
most abundant L:in Earth s environment as N 2 gas
about 78 percent of the air
we