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15 cards from this deck
H2OH_2OH2O
Clean water
Ions and gases
Mg2+Mg^{2+}Mg2+, Ca2+Ca^{2+}Ca2+, Na+Na^+Na+
Oxygen and carbon dioxide
Lowers the pH
Bacteria and viruses
Fertilisers, pesticides, household/industrial waste
150 litres
Cooling machinery in factories
Growing food on farms
Insufficient rain to replenish water supplies
Demand exceeds supply
Take showers instead of baths
Repair dripping taps
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