water pollution and solutions section 3. water covers ¾ of the earth’s surface. where is the...
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Water Pollution and Solutions
Section 3
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Water covers ¾ of the Earth’s surface.
Where is the water from?
Ice in the polesClouds
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Why is it a scarce resource??
SALTsalt water is 97% of the water on earth-which
cannot be used for drinking or watering crops
Ice¾ of the FRESH water is in the form of ice
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Groundwater
Stored in soil and rock beneath the surface
What are the layers of the soil?
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Here’s the secret…
fresh water is renewable!!HOW?!
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Water ShortagesOccur when people use water in an area faster
than the water cycle can replace it.
Many places in the world NEVER
receive enough water to meet the
needs of their own growing populations.
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Water PollutionIron or Copper- Can cause the water to be
unpleasant
Cause sickness or death.
Most pollution comes from Humans!! –waste run off
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6 Sources of Water PollutionHousehold Sewage- human wastes washed down
sinks, toilets and showers
Agricultural Wastes- pesticides and fertilizers
Industry and Mining Wastes
Sediments
Heat
Oil and Gasoline
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Sediments
Sediments are particles of rock, sand and clay that are washed away by water.
Once they settle, it can cover up food sources and block sunlight, preventing algae and other
plants from growing.
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Oil and Gasoline Spills
An oil spill is one of the MOST dramatic forms of water pollution.Nature can handle it in small amounts but not in large ones.
Gasoline or oil that leaks out is extremely hard to clean up.
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Keep it cleanThe key is…
Sewage TreatmentReducing PollutantsCleaning up Oil and Gasoline Spills
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At Home…Household Water Pollutants:
PAINT PAINT thinnersMotor OilGarden Chemicas