Download Name of Group Presentation is for

The Greenhouse Effect
On a hot day a car is left outside in the sun with
all the windows wound up. After an hour or so a
person opens the door and gets into the car.
The first thing the person notices is how hot the
car is.
What has happened?
+
=
The heat from the sun has entered the car through the glass and
has been trapped inside the car, therefore the temperature rises.
When the car door is opened, the trapped heat escapes and the
temperature inside the car starts to reduce.
The
atmosphere
around the earth
acts in a similar
way by trapping
some of the
sun's heat.
This is what
keeps the
temperature on
earth warm
enough to
sustain life.
This trapped heat in the earth's atmosphere is
called the Greenhouse Effect.
One main type of greenhouse gas is carbon
dioxide which comes from burning fossil
fuels.
A fossil fuel can be, coal, gas, petrol, diesel or oil.
Carbon dioxide is released into the atmosphere when
there is a bushfire, when a heater is lit, when coal is burnt
in a power station and when petrol is burnt in a car.
The more we burn fossil fuels, the more the
atmosphere is polluted with greenhouse gases
and the more likely the atmosphere will heat up!
This is called Global Warming.
Most scientists are unsure what the effects of
Global Warming will be or how quickly they will
occur.
Many think that more ice around the poles will
melt and this will cause the sea levels to rise.
People from countries around the world are
worried about the effects increased
temperatures could have on our planet.
They have started to develop a plan to reduce
the rate greenhouse gases are released into the
atmosphere. The agreement reached is called
the Kyoto Protocol.