Transcript Resources and Conservation

Pollution and Air Pollution
A substance that contaminates the environment
 A pollutant is __________________________________
 Types of air pollution include:
soot
 _________________
smoke
 _________________
ash
 _________________
Carbon dioxide
 _________________
Nitrogen oxides
 _________________
Sulfur oxides
 _________________
Carbon monoxide
 _________________
MAN MADE VS. NATURAL POLLUTANTS
Natural Pollutants
Man-Made Pollutants
- Volcanic eruptions
-Wind- blown dust and
sand
-- forest fires
-cars
-Trucks
-Airplanes
-Factories
--homes
-Power plants
-Evaporation of paints and
other chemicals
smog
sunlight
Another type of pollution is ______________.
It is created when _____________
burning fuels
reacts with pollutants produced by ___________________.
Acid Rain
 How does acid rain form?
Air pollutants from the burning of fossil fuels reacts with water in the
air to form strong acids that precipitate down from clouds.
 Effects of Acid Rain
-nutrients washed away tree or plant death
-Acid rain runoff flows into lakes/ponds which could harm or kill the fish or other
organisms living there.
 Preventing Acid Rain
-use natural gas or low-sulfur coal
-Use smokestacks that remove sulfur dioxide before it enters the air
-Use the automobile less
-keep engines tuned
-Use electric cars or hybrid-fuel cars that run on electricity
Acid Rain Destruction
This statue has been slowly
destroyed by acid rain so that
now the faces are barely
visible.
Greenhouse Effect
 Why do we need the greenhouse effect?
Because without this effect, temperatures on Earth would be too cold to
support life.
Critical Thinking….
These days, when people talk about the greenhouse effect, they talk
About it like it’s a bad thing. Why is that?
Global Warming
average
temperature possibly
 A rise is the Earth’s ________
__________
increase
cause by an _________
in greenhouse gasses is known
as global warming.
 What kinds of changes could be caused by global
warming?
Changing rainfall patterns could alter ecosystems & affect kinds of crops
 _______________________________________________
 _______________________________________________
Storms & hurricanes might increase
Polar ice caps may melt rising sea levels & flooding areas
 _______________________________________________
Tropical disease could become more widespread
 _______________________________________________
Ozone Depletion
The thinning of the ozone layer
 Ozone depletion is ______________________________
Chlorofluorocarbons
 ________________(CFCs)
are the main pollutant
gasses that cause this.
 Where do CFCs come from?
refrigerators
 ___________
freezers
 ___________
air conditioners
 ___________
leak
 When CFCs ______
into the air, they travel until they
break _______
apart
reach the upper ozone and ______
the ozone
molecules.
This image, captured from the Ozone Monitoring Instrument (OMI)
aboard NASA's Aura satellite, shows the area of the ozone hole
over Antarctica.
November 1979
November 2009
UV Radiation
 Because of ozone depletion, the amount of
___
that reaches the earth’s surface is
UV ___________
radiation
increasing.
Think about it….
What is the difference between the ozone in the upper
atmosphere and the ozone in the lower atmosphere?
Ozone in the upper atmosphere protects life on Earth.
Ozone in the lower atmosphere pollutes the air damaging
the lungs and other sensitive tissues of animals and plants.
Water Pollution
 How can water get polluted?
Air pollutants can get
washed out by rain.
Factories and sewage
plants can release
pollutants
Rain can wash land
pollutants into water.
Fertilizers
pesticides
Critical Thinking…
How can water pollution cause harm to humans even if they are never in the water?
How can ground water get polluted?
Ground water can get polluted by the pollution leaks into the ground and then
enters into our ground water.
Soil Pollution
 How can soil be polluted?
 Air pollution drifts to ground
 Water leaves pollutants behind
 Litter landfills
 Pesticides
 Radioactive wastes
 Petroleum based solvents
 Hospital wastes
 How does this
diagram show
soil and water
pollution?