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4.3 Water, Air, & Land Resources

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Page 1: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

4.3 Water, Air, & Land Resources

Page 2: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

The Water PlanetWater covers over half of Earth’s surface (71%)

Saltwater

Freshwater

< 1% of the water on Earth is useable to us

Page 3: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

Pollution of FreshwaterPoint Source

Pollution

Comes from a known source or a specific location

ExamplesFactory PipesSewage treatment

plant

Nonpoint Source Pollution

Does not have a particular point of origin

ExamplesRunoff often carries

nonpoint source pollution

RainfallSnow

Page 4: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is
Page 5: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

Pollution in the AirThe chemical make up of the atmosphere helps

to maintain life on Earth

Atmosphere shields Earth from solar radiation

Fossil Fuel combustion is the major source of air pollutionCarsCoalOil burning power plants

Page 6: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

Pollution in the Air continued…

CFCs (Chlorofluorocarbons) destroy ozone layer Problem? Increase health problems

CO2 amts. in the atmosphere have increased since industrialization started in the 19th century

Carbon cycle has since been altered which in return leads to unnatural warming of the atmosphereGlobal Warming

Page 7: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is
Page 8: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is
Page 9: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

Land Resources Earth’s land provides soil & forests, as well as mineral & energy

resources

Irrigations Farming new land (+) Depleting groundwater (-) Salinization (-) build up of salts in the soil

Mining (~500,000 in US) Essential for mineral resources (+) Messes up Earth’s surface (-) Destroys vegetation (-)

What are land resources? Soil to grow food Forests for lumber, furniture, paper

Page 10: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

Land Resources continued…

Land for Disposal SitesLandfillsWhen done correctly little damage is doneWhen done incorrectly harmful wastes leak into

the soil and groundwater

Clearing of trees by clear-cutting = damaged landRemoving all the trees from a forestDestroys ecosystems

Page 11: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is
Page 12: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

Motion Accelerates Erosion Activity

Page 13: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

4.4 Protecting Resources

Page 14: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

How to Protect What We Have

Water

1970S the Federal Govn’t passed several laws to prevent or decrease pollution & protect resources

1972 Clean Water Act

1974 The Safe Drinking Water Act

Air

1970 Clean Air Act (most important air pollution law)

Increased use of alt. energy sources help clear the air

Protecting the land resources involves preventing pollution & managing land resources wisely.

Page 15: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

How You Can Prevent Water Pollution

How You Can Save Energy

• Never pour household chemicals down the drain / toilet (cleaners, paints, thinners)

• Never dump toxic chemicals in the gutter into the ground

• Don’t put things that contain hazardous substances in the trash (batteries)

• Avoid using hazardous substances in the beginning

• Recycle

• Let the sun in to warm rooms

• Use energy – saving fluorescent bulbs

• Look for the Energy Star sticker when you buy electric products

• Turn off lights when you leave the room. Turn off radio, TV, or computer when not in use

Page 16: 4.3 Water, Air, & Land Resources. The Water Planet Water covers over half of Earth’s surface (71%) Saltwater Freshwater < 1% of the water on Earth is

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