Transcript Environmental Issues - Lehi FFA

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