Presentation

1. Global Warming
Eleni Nouvaki
Antonia Vasakou

2. What is global warming
Global warming is the raise in the temperature of
the atmosphere and the oceans. The
temperature of the planet has increased about
0.6 degrees Celsius since late 19th century

3. Causes
Global warming is caused by either
natural procedures (e.g. solar activity,
release of greenhouse gases from
volcanoes) or human activities (e.g.
fumes , electric power).

4. How that happens
Part of the stratosphere is the ozone layer
which functions like a greenhouse. As it
allows a part of the solar rays to reach the
Earth, there can be life and
evolution,however it prevents some ultra-violet
rays to reach the Earth. Due to the
harmful gases that are produced by
human activity, the ozone layer gets
thinner and so the ultra-violet rays ,which
were once stopped, can get through it.

5. The gases which come from industrial activity and
from cars (fumes), create in the lower part of the
atmosphere a thick layer which doesn’t allow the
rays to return to space, increasing the
temperature of the Earth and causing changes in
the climate .

6. Greenhouse gases
The most important are:

7. Solutions
1) We should try to reduce
the emission of the
greenhouse gases, using
less our private cars and
preferring public means of
transport.

8. 2) We can plant
more trees so that
the carbon dioxide
is absorbed by
them.

9. 3) We should reduce the greenhouse effect,
using renewable sources of energy (e.g. the
wind , the sun, and biomass).

10. the end