Environmental Issues - Lehi FFA
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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
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
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