1. The Earth receives a total solar
radiation, corresponding to a flow of about
1966 W/m2, the boundary of the atmosphere.
One part of this is absorbed by the system
earth-atmosphere, the remainder escapes into
space. Approximately 30% of the incoming
solar radiation is reflected, in 6% of the
atmosphere, 3% from the clouds and 4% of the
Earth's surface. About 70% of solar radiation
absorbed by 32% from the atmosphere
(including the stratospheric ozone layer) by
3% from the clouds and the large majority
(51%) of the surface and the oceans.

2. The presentation and understanding of the greenhouse effect
The presentation of the phenomenon with pictures
The chronological presentation of the history of the
phenomenon
How compounded phenomenon and what causes it, what the
results of
What are the greenhouse gases
How can we reduce greenhouse gases how can we, our school
and our home to help reduce greenhouse gases

3. All gaseous components of the atmosphere that
contribute to the greenhouse effect, collectively
referred to with the term greenhouse gases.
Absorb longwave terrestrial radiation and re-
emit thermal radiation heating the surface.
Certain gases such as ozone, have translucency
and solar radiation, thus absorbing a part
of, contributing to a degree and cooling of the
earth's surface.

4. The greenhouse effect is natural, but enhanced by
human activity, which contributes to increased
concentration of greenhouse gases and the release
of other trace elements, such as
chlorofluorocarbons (CFC's). In recent years,
recorded an increase in the concentration of
several greenhouse gases, and particularly in the
case of carbon dioxide, the increase was 31% in the
period 1750-1998. Three-quarters of the
anthropogenic production of carbon dioxide due to
fossil fuel use, while the rest comes from changes
on the ground, mainly through deforestation.
Besides humans, methane produced by animals
(e.g. cows) with the burping