to regulate what comes in and leaves the cell
Dust in the air because the water molecules need something to condense around.
Cell are the structural and functional unit of living organisms
The widespread, large scale, worlddwide burning of enormous quantities of fossil fuels for their energy, such as coal, oil, and natural gas, could do that, if it ever began and became popular.
Oh, wait ! That"s what we've been doing, for a couple of centuries now !