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					If We Wear Out Our Planet,
    Where Will We Live?
        The Big 8 Concerns:

   Population Growth      Water pollution
   Air pollution          Acid rain
   The ozone              Solid waste
   Greenhouse effect      Toxic waste
THE EARTH’S POPULATION

1830   1 billion

1950   2 billion
1990   4 billion
PROJECTED for 2050:
      10 billion
     Air Pollution =
             Pollution source
                     +
Mountain and valley so winds can’t blow out
                     +
          Temperature inversion
     (Warm air, trapping cooler air)
TEMPERATURE INVERSION
SMOG =
      Ozone

      Carbon monoxide

      Sulfur dioxide

      Nitrogen dioxide
Major Sources of Air Pollution

   Burning of fossil
    fuels

   Burning solid waste

   Natural pollutants
    like forest fires
          Air Pollution Risks:

   Increased smog = decreased oxygen
   Breathing difficulties for people with:
       Asthma
       COPD
       Congestive heart failure
       Emphysema
  Imagine that the earth is 80” in
diameter. It’s atmosphere would =
                1/10”
      ACID RAIN =
    Atmospheric pollutants
              +
      Moisture in the air


Falls to earth as rain, sleet, snow or
                 hail.
        Effects of Acid Rain:
   Acidified lakes and streams = no fish.
   Damaged trees.
   Toxic substances released into soil.
   Corrodes metals on buildings.
   Damages stone and paint on buildings.
   Damages monuments and cars.
    What Can We Do?
   Cut back on driving: ride bike, use
    public transportation, walk, car-pool,
    drive a fuel-efficient car

   Keep car tuned up and well-
    maintained, use unleaded gas and
    keep tires inflated
   Stay in speed limit.

   No quick starts.

   Don’t use air conditioning.

   Don’t idle the car.
          THE OZONE

          A layer of gases,
   10-30 miles above the earth’s
                surface,
which shield the planet from UV rays
Problem: the OZONE is thinning
      Primary Cause: CFC’s
        Chlorofluorocarbons (CFC’s)
        are industrial chemicals used:

   Coolants in refrigerators and home and car
    air conditioners
   Foaming agents in some foam products
   Propellant in aerosol spray cans
      (banned in 1978)
        CFC’s

Rise into the atmosphere
  and break down the
       ozone layer.
   REMEMBER:
     The Ozone is:

 Good up there
  Bad down here
                The Effects:
   More UV rays = increase in skin cancer
   More UV rays = decrease in crop yields
      (interferes with photosynthesis)
   Change in weather patterns
    What Can We Do?
   Buy energy star appliances.
   Dispose of old refrigerators, air
    conditioners and humidifiers wisely.


   Have your car’s air conditioner
    checked and serviced by a station
    that recycles CFC’s.
The Greenhouse Effect
           The Good News:
   The greenhouse gases
    include: carbon
    dioxide, water vapor,
    and methane
   Allow light in
   Trap heat to help
    raise earth’s temp
   Natural process
The Bad News:
One of the Causes:
          O
Some of the Results:
             Florida’s coast,
              battered by hurricanes

             California fries

             Kansas plains
              confront the fury of
              the skies
Global Warming =
 Melting Icecaps
           Melting icecaps = rising
            sea levels

           Miami, Fla. and New
            Orleans, La. would
            disappear

           Every city on the U.S.
            Eastern seaboard would
            be inundated
        WHAT CAN WE DO?

Run dishwasher with a full load, only. (Reduces
carbon dioxide 200 lbs. Per year.)

Wash clothes in warm or cold water, not hot.
(Reduces carbon dioxide by 500 lbs. per year.)

Turn down water heater to 120°.
(Reduces carbon dioxide by 500 lbs. per year.)
SOLID WASTE
     What’s in our garbage?
   Paper products:   38.9% by weight
   Yard waste:       14.6%
   Plastics:         9.5% by weight
                      18% of space
   Metals            7.6%
   Wood              7.0%
   Food              6.7%
   Glass             6.3%
ENDURING LITTER:
  Paper
2-4 weeks




            Cotton Rag
            1-5 months
   Rope
3-14 months




              Wool Sock
               1 year
Bamboo Pole
 1-3 years



                Painted
              Wooden Stake
                13 years
            Aluminum Can
            200-500 years




 Tin Can
100 years
              Glass Bottle
Plastic 6-
   pack
  Cover
  450 years
              Undetermined
            Sanitary Landfills:
   A site that is not near   Despite the liner,
    groundwater is              contaminants can leak
    selected.                   into surrounding soil
   Layers of solid waste       and groundwater.
    are covered with dirt.
   Grass and trees may
    be planted on top.
   Little decomposition
    occurs.
          What Can We Do?
Buy products with the least amount of packaging
Reuse paper and plastic bags
Avoid using foam or paper cups.
Recycle newspapers, glass, cans, paper and other
recyclables. Take foam pellets to a recycling center.
Start a compost pile for your organic garbage.
When shopping, take along your own bag.
reduce, reuse, recycle
WATER
 DRINKING WATER:
Where does it come from?
1. Wells / ground water

2. Surface water
  rivers
  lakes
  streams
  ponds
     In Contra Costa County:
Water comes from the Sacramento – San
   Juaquin Delta

It’s transported in the Contra Costa Canal

Stored in reservoirs like Los Vaqueros

Treated by the Contra Costa Water District
POTENTIAL CONTAMINANTS:
 •   industrial wastewater
 •   urban and highway runoff
 •   agricultural runoff
    Contaminants, continued:

•   pesticides
•   mine runoff
•   grazing animals
What’s in your Drinking Water?
 microbial contaminants: bacteria,
     viruses
  inorganic contaminants: salts,
     metals
  pesticides and herbicides
  organic chemicals
  radioactive contaminants
    What Can We Do?
                 PRESERVE
   Never put anything but clean water into
    a gutter or down a storm drain.
   Use non-chemical pesticides and
    fertilizers.
    Always recycle used motor oil.
    Use non-toxic cleaning alternatives.
    Clean up after your pet.
             CONSERVE

 Take showers, not baths
 Don’t let water run when you’re not
  using it.
 Run dishwashers and washing
  machines with a full load.
 Purchase water-efficient shower
   heads and toilets.
 Fix leaky faucets.
IS IT WORTH SAVING?

				
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posted:12/9/2012
language:English
pages:55