Weegy: biosphere User: Although nitrogen gas makes up 78% of the atmosphere, we can't use it because _____.
A.)nitrogen gas is explosive
B.)we must absorb it through the soil
C.)nitrogen atoms must be broken apart first
D.)we must absorb it through the sun Weegy: Colorless nitrogen gas makes up 78% of the atmosphere, but here we see it in liquid form at -196DegreeC. It is boiling off, creating a visible vapor--not of steam, but of water ... (More)