Pollution?
i donno lolIt removes the bacteria and unwanted substances which are bigger than water molecules from the water.
air, water
Water, copper, and oxygen are pure substances. The others are mixtures.
Tobacco, water and air.
Fuels
Excretion of unwanted substances, water balance, blood pressure regulation, regulation of red blood cells productions.
Air, iron and water will cause the iron to rust.
Kidneys
the liver
sperm.
Pollutants
one substance that pollutes the air