WATER CYCLE

Purification METHOD 1

• For 15 to 20 minutes kills 99.9 percent of bacteria and germs and vaporizes most chemicals.

Purification METHOD 2

• DISTILLATION boils and turns back to water but many chemicals vaporize and condenses back to water but its expensive.

Purification METHOD 3

• Chlorine is a common cheap but toxic does not lower physical or chemical contamination and could cause heart disease.

Purification METHOD 4

• SILVER is effective in killing bacteria and it can not evaporate.