environmental issues. pollution n the presence of a substance in water, air, or soil that makes them...
TRANSCRIPT
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Environmental Issues
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Pollution
The presence of a SUBSTANCE in water, air, or soil that makes them OFFENSIVE to humans.
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WATER
Is one of our most precious RESOURCES
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Water
Water that is suitable for DRINKING is referred to as POTABLE water
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Sources of Pollution Oil Products Soil Erosion Animal and Human Waste Chemical fertilizers, pesticides,
and herbicides High temperature water discharge
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Eutrophication
An increase in the amount of NUTRIENTS in an environment
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Nutrients
Nutrients in water are expressed in terms of PARTS PER MILLIONS (PPM)
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Nitrates
Nitrates are a common source of POLLUTION
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Sources of Nitrates
Animal Waste Human Waste Chemical fertilizers Dead and decaying
organisms
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Eutrophication
One of the first INDICATIONS of eutrophication in water is the presence of ALGAE
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Eutrophication
Also known as POND SCUM
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Waste Control
Sewage Treatment Plants
Septic TanksWaste Lagoons
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Sewage Treatment Plants
Larger towns and cities Treat waste water to remove
B.O.D. Use Oxygenation, Chlorine, &
UV Light Tremonton, Brigham City
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Septic Tanks
Used in rural areasSettling tank and Drain
FieldWill not work if area is
densely populated
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Waste Lagoons Used in dairies, feed lots, and
some towns and cities Logan and Perry Animal waste is stored in a
settling pond where it is decomposed by anaerobic bacteria
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Water Pollution
Occurs in both groundwater and in surface water
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Ground water
Water stored in underground lakes called aquifers
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Surface Water
Water is absorbed by the soil as it flows into the aquifers
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Non-Point Source Pollution
Pollution that originates from many sources
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Point source pollution
Pollution that results from a single source
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Erosion
Our largest environmental problem
Wasting away of soil by wind or water
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Two main problems of erosion
The loss of TopsoilThe pollution of water by the erosion of soil
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Soil Erosion Damage
Loss of topsoil Pollution of rivers and streams Kills fish and plants
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Soil Conservation Service
An agency organized to help prevent the loss of topsoil and to stop erosion caused by the washing away of soil.
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Examples of soil conservation practices Windbreaks Terracing Crop rotation (summer fallow) Contour plowing No-till and minimum till planting
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Wetlands
A piece of land that stays underwater for most of the year
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Wetlands provide several roles
Habitat Filtering of water Water storage Flood prevention
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EPA Regulations
Restrict use Incentives to preserve
wetlands Permit must be obtained
before land can be disturbed
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