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Land Resources Forest Resources Ocean Resources Air Resources Water Resources Ozone Depletion Global Warming Human Impact

LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

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Page 1: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Land ResourcesForest ResourcesOcean Resources

Air ResourcesWater ResourcesOzone DepletionGlobal Warming

Human Impact

Page 2: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Land Resources

What is happening? Plowing removes the roots that hold the soil in place,

increasing the rate of Soil erosion SOIL EROSION – is the wearing away of surface soil by

water and wind. Desertification- the process of turning once productive

areas into deserts from a combination of farming, overgrazing, and drought.

Page 3: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Land Resources

Why is it a problem? Soil is a renewable resource, however it can be

permanently damaged if mismanaged

What is being done? Contour plowing- fields are plowed across the slope of the

land to reduce erosion Leaving stems and roots of the previous year’s crops in

place to hold soil

Page 4: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Forest Resources

What is Happening? Deforestation- loss of forest

which leads to severe erosion Why is this a problem?

Old growth forest can be considered a nonrenewable resource because it would take centuries to reproduce

Forests provide O2 and remove CO2 from the atmosphere

They also store nutrients and provide food and habitat to organisms

Page 5: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Forest Resources

What is being Done? Tree farms can be planted

and harvested efficiently making them fully renewable resources

Tree geneticists are also breeding new, faster-growing tree varieties that produce high- quality wood.

Page 6: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Ocean Resources

What is happening? Overfishing- fish stocks in

many fisheries are being harvested faster than they reproduce.

Why is this a problem? People depend on the ocean

as a major source of protein, both from finfish and from shellfish

With the amount of fish caught each year increasing the fish cannot reproduce fast enough to keep up

Page 7: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Ocean Resources

What is being done? Limiting the catch of fish Certain fishing grounds have

been temporarily closed Aquaculture- farming of

aquatic organisms

Page 8: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Air Resources

What is happening? Smog- a mixture of chemicals that occurs as a gray-brown haze

in the atmosphere. This is due primarily to automobile exhausts and industrial emissions

Pollutant- a harmful material that can enter the biosphere through air, land or water The burning of fossil fuels can release pollutants that cause smog and

other problems in the atmosphere.

Page 9: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Air Resources

Why is it a problem? This leads to toxins that enter the mouth, nose and lungs causing

health problems over the long term. Gases released from the burning of fossil fuels combine with water

vapor to form ACID RAIN Acid rain kills plants, and changes the chemistry of soils

What is being done? Technology to control emissions from factory smokestacks Strict automobile emission standards and clean air regulations

Page 10: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Water Resources

What is happening? Pollution such as OIL

SPILLS threatens our water supply

Improperly discarded chemicals can enter streams and rivers

Domestic sewage entering or water ways causing increase in bacteria growth

Page 11: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Water Resources

Biomagnification

Page 12: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Water Resources

Why is this a problem? Fresh water is used daily for everything from drinking and

washing to watering crops and making steel. Although water is a renewable resource, the total supply of

fresh water is limitedWhat is being done?

Conservation by: drip irrigation, and consumer awareness of conservation

Page 13: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Ozone Depletion

What is happening? Chemicals called CFC’s

which were once widely used in aerosol cans, the production of plastics and as coolants in freezers, refrigerators and air conditioners have caused a hole in our ozone layer and this hole is continuing to grow

Page 14: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Ozone Depletion

Why is this a problem? The ozone layer absorbs a

great deal of harmful UV rays before it reaches the earth’s surface .

As the ozone layer is depleted UV exposure can cause sunburns, cancer, eye damage and decrease an organism’s resistance to disease

What is being done? The US has joined many

other nations to phase out the use of CFCs

Page 15: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Global Warming

What is happening? An increase in the average temperature of the biosphere. Over the past 120 years global temperatures have risen .5

degrees Celsius CO2 and other gases are being released into the

atmosphere and being retained causing more heat.

Page 16: LAND RESOURCES FOREST RESOURCES OCEAN RESOURCES AIR RESOURCES WATER RESOURCES OZONE DEPLETION GLOBAL WARMING Human Impact

Global Warming

Why is this a problem? Polar ice caps will continue to melt

and could rise enough to flood some low lying coastal areas

Storms and other weather disturbances could become more frequent and severe

Heat favors rodents weeds and insect that reproduce and spread quickly

What is being Done? Alternate energy sources

are being researched to reduce or stop the burning of fossil fuels that release gases into the atmosphere that retain heat.