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Global
Climate Change
The
earth's atmosphere is a very thin layer of
gases, like the skin of an apple is to its
fruit.
99% of the atmosphere is made up of only two
gases: nitrogen (79%) and oxygen (20%).
Carbon dioxide makes up only about .036%,
yet its concentration, and that of water vapor
are vital to the earth's health.
Learn About Global Warming
What
can you do?
What
is the Greenhouse Effect |
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Learn About Global Warming:
Start
with the 1999 film "A Perfect Balance"
from the Earth Communications Office
Go to www.oneearth.org click on Communications, then Campaigns, then
1999.
Leonardo DiCaprio's Eco-Site has a great introductory
video clip. Follow the link below, and select
"A message from Leonardo DiCaprio."
http://www.leonardodicaprio.org
U.S. Environmental Protection Agency's official
site on Global Warming:
Global
Warming
and a great introduction for kids:
Global
Warming for Kids
"The Premier Climate Change Portal"
includes Climate Change Overview and Vital Climate
Graphics: ClimateArk.org |
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What
can you do?
Here are 20 steps that you can take
to mitigate global warming today:
Global
Warming- Undoit
Find
out how much carbon dioxide you emit
in your daily life:
Carboncounter.org |
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Greenhouse
Effect
How the greenhouse
effect works:
- Most of the sun's directed energy reaches
the earth
- About 30% of the energy is reflected back
into space
- Ozone layer shields the earth from the sun's
harmful ultraviolet radiation
- Burning of fossil fuels and deforestation
increase carbon dioxide in the atmosphere
- Added to this are chlorofluorocarbons (CFCs
- manmade gases used in spray cans, refrigerants,
and insulations), and methane (from landfills,
farming, and swamps)
- Together these gases form a 'blanket' which
traps energy, thus warming the earth |
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