1. CAMBIO CLIMÁTICO, DESERTIFICACIÓN Y
DEFORESTACIÓN EN MÉXICO.
Equipo #9 “Lealtad”

2. Climate change
It is a fact that the climate change being alteredt this
one significantly.

3.  The different climatic types and his location in the
terrestrial surface obey certain factors, being the
principal ones, the geographical latitude, the
altitude, the distance to the sea, the orientation of
the terrestrial relief with regard to the sunstroke
(slopes of sunlight and shady) and the direction of
the winds (slopes of Lee and windward) and
finally, the marine currents. These factors and his
variations in the time produce changes in the
principal constituent elements of the climate that
also are five: atmospheric
temperature, atmospheric
pressure, winds, dampness and rainfalls.

4. A change in the
emission of solar
radiations, in the
composition of the
atmosphere, in the
disposition of the
continents, in the
marine currents or
in the orbit of the
Earth can modify
the distribution of
energy and the
thermal
balance, altering
this way deeply the
climate when it is a
question of
processes of long
duration.

5.  The human influence on the climate
in many cases is considered to be
an external raping since his
influence is more systematic than
chaotic but also it is true that the
Homo sapiens belongs to the own
terrestrial biosphere being able to
be considered to be also internal
rapings according to the criterion
that should be used.

6. Deforestation and desertification.
Our forests vanish and with them all the species that
they them live thanks to this.

7. Mexico is one of the countries
with major biodiversity in the
planet, and a great part of this
biodiversity depends on the
forests and jungles. This natural
wealth has had an expression in
the cultural area, where multiple
cultures have created
social, cultural and artistic forms
concerning this ecosystem.
Today, this is in risk.

8.  The deforestation carries a drastic decrease in the
water supply to local and national scale.
Likewise, there breaks the climatic balance to
regional and even planetary level, which irritates the
threat that represents the global climate change.
In Mexico, the principal reason of deforestation is the
change of use of soil to turn the forests into
herdsmen or fields of culture

9.  The desertification can be reason or effect of the
process of aridización. Originally this happens in
the zones that are fertile, where the sequential
agriculture is practised. The increase of the
population forces to an intensive exploitation of the
area until his depletion takes place. The second
stage begins when the soil stops being fertile and is
taken off of his vegetable cover, the water and the
wind erode it more rapid up to coming to the rock.
In most of the zones of culture the soil erodes much
more fast than it delays in being formed. They
might need decades or centuries in order that the
landscape was returning to cover of green.

10.  According to the Program of the
United Nations for the
Environment (PNUMA), the
desertification threatens to the
fourth part of the planet, affects
directly more than 250 million
persons and puts in danger the
means of life of more than 1 000
million of inhabitants of more
than 100 countries on having
reduced the productivity of the
toerras destined for the
agriculture and the ranching.
These persons include many of
the poorest countries, more
underprivileged persons and the
politically weaker citizens.
Though the desertification can be
provoked by the droughts, in
general his mainspring is the
human activity: the culture and
the shepherding exceivos, the
deforestation and the lack of
irrigation.