Neither. The specific gravity is generally less than air, so one might think it would raise. However, it will quickly mix (disperse) in the room's air, so the concentrations of gas indoors will not be much different.
It does not rise or fall. It is an imaginary line.
because global warming and greenhouse gasses like co2 carbon dioxide.
Fall is the height of a slanted or diagonal straight surface. Gradient is the result of rise divided by fall (rise/fall) (rise over fall)
because global warming and greenhouse gasses like co2 carbon dioxide.
The rise and fall is the tides.
rise
They Absorb co2, they give off oxygen
An Orchestrated Rise to Fall was created on -19-12-09.
The word is undulate. It means rise and fall.
rise
rise