GREEN HOUSE EFFECT GLOBAL WARMING

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GREEN HOUSE EFFECT GLOBAL WARMING Powered By Docstoc
					GLOBAL WARMING &
GREEN HOUSE EFFECT

The overwhelming majority of scientists now agree that our globe is

undergoing major climate change. They also agree that the level of carbon

dioxide in the atmosphere is rising at a terrifying rate.

We can see from satellite images that the ice caps are melting faster, our

sea levels are rising, and weather patterns are changing. We are

experiencing more water shortages and we will see hurricanes, typhoons

and cyclones increasing in ferocity and frequency. The deserts will expand

and the world will ultimately have difficulty growing enough food. Without

doubt, we have to change the way we live.

One of the contributions to Global Warming is the ‘green house effect’

which causes warming of the Earth's atmosphere and warming of the

Earth's surface as a result of atmospheric pollution by gases.




ENVIRONMENTAL SERVICES                1               CONSUMER EDUCATION TEAM
PLEASE FIND ANSWERS TO THE FOLLOWING QUESTIONS:

   What are the ‘Greenhouse gases’ that cause this effect on the earth?

   Where do these gases come from?

   What is ‘global warming’ and how does it effect the planet and us?

   Why should populations who live below sea level be very concerned about

    global warming?

   What is the ‘Ozone layer’ and why is it important?

   How do Chlorofluorocarbons affect the

    ozone layer?

   What is meant by ‘climate change’?

   Why should we be worried about polar bears

    and other arctic animals?

   Why are the tropical rainforests important – how can trees be the ‘lungs

    of the world’?

   What does ‘deforestation’ mean and what are the

    effects?

   What are the solutions to reduce this effect on the

    earth?


OTHER ACTIVITIES

   Draw a diagram to show how the Greenhouse effect works.




ENVIRONMENTAL SERVICES                2                  CONSUMER EDUCATION TEAM
                         DEFORESTATION




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                                      CHLOROFLUOROCARBONS

Chlorofluorocarbons (CFC) are compounds that contain chlorine, fluorine and carbon only, that is they contain no
hydrogen. They w ere formerly used w idely in industry, for example in refrigerators, aerosols, rocket engines and
some cleaning fluids. Their use has been regularly prohibited because of chemical effects on the ozone layer. They
are also a pow erful greenhouse gas.

The CFC problem:
1. CFC’s are released and rise to the stratosphere;
2. Sunlight breaks dow n the CFC’s releasing chlorine;
3. Chlorine destroys the ozone;
4. Increased sunlight reach the Earth’s surface,
   raising the risk of skin cancer and other dangerous
   consequences.

Ozone levels, over the Northern Hemisphere, have
been dropping by 4% per decade. Over approximately
5% of the Earth’s surface, around the north and south
poles, much larger (but seasonal) declines have been
seen, these are the holes in the ozone layer.




ENVIRONMENTAL SERVICES                                    4                                 CONSUMER EDUCATION TEAM
                         DEFORESTATION




ENVIRONMENTAL SERVICES         5         CONSUMER EDUCATION TEAM
                         HOW THE RAIN FOREST SHOULD LOOK




ENVIRONMENTAL SERVICES                  6                  CONSUMER EDUCATION TEAM