Changement climatique

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INTRODUCTION

1. DEFINITION
2. CAUSES
3. CONSEQUENCES
4. SOLUTIONS

CONCLUSION

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The world faces has a crisis without precedent since the end of the Second World War, this crisis touches even the smallest class of our company and east names the climatic change.   However, Quesque that climatic change?   Which are the causes and the consequences?   Which are the solutions?

In our work, we initially will define the climatic change term, in a second speech of the causes and consequences and in a last time to give the solutions.

1. DEFINITION

Climatic change

The climatic change is a durable and total modification climatic and weather parameters of the Earth exceeding the scale of the natural cycles.

It is also the whole of the variations of the climatic characteristics in a given place, in the course of time: reheating or cooling. The certain shapes of pollution air, resulting to modify the climate appreciably, in the direction of a total reheating.

1. CAUSES

The causes of the climatic changes are multiple but that which causes the most damage is the Gas for Purpose of Serre(GES)

Emissions of anthropic GES since the beginning of the industrial revolution - resulting mainly from the fossile fuel combustion necessary to transport, industry and the d`énergie production, and the deforestation of the forests made increase considerably the level of GES in the atmosphere and multiplied by ten the effect of greenhouse.

• Déforestation

Permanent deforestation creates also imbalances and can increase the effect of greenhouse in several ways. Whether the cut down trees are burned or that they break up naturally, they emit CO2 But if one does not replant trees, there will be nothing to absorb the carbon emitted by the cut trees, and this will make increase the quantities of CO2 in the atmosphere.

•  Industries

The countries which emit the most gas for purpose of greenhouse are the countries rich and industrialized like the United States or the European countries. The emissions per capita of the rich countries are much more significant than for a poorer country. The countries in the process of development are still far from catching up with the rich countries with regard to the emissions per capita.

1. CONSEQUENCES

• Animal and vegetable species

The consequences of this climatic change are:modification of the habitat of the animals as well as plants, which will cause an imbalance of the distribution of the species and will disturb the ecosystems.

In ecology, an ecosystem is the unit formed by alive beings and their environments.

• Animals

In the animals, the consequence of the climatic change is a migration of certain species towards the poles or in altitude what makes them enter in competition with other species. This competition will be able to surely cause the elimination of a species by another.

• Plants

At the vegetable species, the consequence of the climatic change is that they would move towards north for the majority or would die because of their incapacity to migrate (because of various reasons).

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