Global warming: What is
The Warming of the Earth Could
Change the Way You Picture the
Table of Contents
• Slide 1……………………Title Slide
• Slide 2……………………Table of Contents
• Slide 3……………………Global Warming Video
• Slide 4……………………Causes of Global
• Slide 5……………………Contributors to Global
• Slide 6……………………What’s Up With the
• Slide 7……………………Greenhouse Gases
• Slide 8……………………This News Is not New!
• Slide 9……………………Which Countries are
• Slide 10………………….The Breakdown
Researchers around the
world agree that the climate
around the world is
changing. Most people
believe that the world’s
population is contributing to
this climate change. This
idea is called Global
Many scientists believe that some human activities cause global warming.
Some of these activities include:
•Cutting down trees
•Producing more trash
•Polluting the environment
•New Technologies that release greenhouse gases into the atmosphere.
There are, however, some scientist out there that do not believe that
humans are contributing to the climate change. Some researchers believe
that there is a natural warming pattern that the earth is following
What in the world is a CFC?
CFC stands for
Chlorofluorocarbons. These are
chemicals made up of carbon,
CFC's fluorine and chlorine atoms.
Forestry These chemicals are very
9% harmful to the environment and
are the one of the main
57% Other contributors to the ozone
Energy depletion. CFC’s are often
found in household cleaning
solutions, hairsprays, and
3% spray paints.
The ozone is a layer of gases that protects the earth from harmful UV
rays. The CFC’s and other chemicals that are being produced and
released are burning holes in the ozone layer! If nothing is done to
stop these gases from being released the ozone layer will soon be
completely gone. The ozone layer is very fragile. Therefore, does not
take much to destroy it. When CFC’s reach the ozone layer the
extreme amount of ultra violet rays breaks them apart. As they break
apart they release chlorine atoms. The chlorine atoms then join the
oxygen atoms that are put out by the ozone. This combination burns
holes in the ozone layer. These holes now allow more harmful and
heat causing rays to reach the earth.
Greenhouse gases are gases that blanket the earth and absorb
heat . This heat absorption helps to keep the world warmer then it
would be with out them. The greenhouse gases are carbon dioxide,
nitrous oxide, and methane.
•Carbon Dioxide is released into the atmosphere by the
burning of solid waste, wood, wood products, and fossil fuels
(coal, oil, and natural gas)
•Nitrous Oxide emissions occur during various agriculture and
industrial processes, and when solid waste and fossil fuels are
• Methane is emitted when organic waste decomposes
(through livestock farming), and also during production and
transportation of fossil fuels.
The overproduction of these gases is leading to the
over heating of the earth.
1827 1890’s to US oceanographer
Warmest year on
French polymath Jean- Roger Revelle warns
Baptiste Fourier suggests 1940 that people are
record. The 1980s turn
Average surface air out to be the warmest
the existence of an conducting a "large-
temperatures increase decade, with seven of
atmospheric effect scale geophysical
by about 0.25 °C. Some the eight warmest
keeping the Earth warmer experiment" on the
scientist see the years recorded up to
than it would otherwise planet by releasing
American Dust Bowl as 1990. Even the coldest
be. He also uses the greenhouse gases.
a sign of the years in the 1980s were
analogy of a greenhouse. Colleague David
greenhouse effect at warmer than the
Keeling sets up first
work. warmest years of the
monitoring of CO2
levels in the
finds regular year-
Most countries are guilty to contributing to global warming, but the most
industrialized countries use the most energy. Therefore, they are most to
blame for the increase in the Earth’s temperatures.
Here is another
way to look at
Look who uses the most energy!!! It!
Are you surprised?
Energy Used by Countries Energy Used
(Measured in Millions of 350
M illions of 200
BTU's use d 150
Japan Germany USA 100
USA Germany Japan
147 190 340 Countrie s
Causes Of Global Warming
CFC's are emitted and The CFC's breakdown and join w ith oxygen that is released by the The holes in the ozone layer are allow ing more heat
go into the atmosphere ozone. These chemicals combined burn holes through the causing rays f rom the sun to reach the earth.
ozone layer. Now, because of the overproduction of greenhouse gases
this heat is being absorbed instead of released.