An increase in the level of the seas will be the most glaring manifestation, triggered off mainly by the thermal expansion of the water and by the partial melting of the snow-caps in the polar regions and the continental glaciers.

According to the average estimations, the average level should increase from 18 to 59 centimetres by 2100. Certain deltas, lagoons and coastal regions might be submerged. Another aspect of the climatic changes will be, a change in the pattern of rainfall, very erratic according to the Its "raison d’être": a shocking state of premises

As a result of climatic changes, there have already been: the 1st quaternary has marked out glaciations and a hot climate. Twenty thousand years ago, the weather in Perigord was like the weather in Siberia. But the current phenomenon has overshot all the events of the last 400 000 years by its enormity and its speed.

In spite of uncertainties, all the forecasts made by scientists point in the same direction: in the course of the 21st century, the average temperature on the Earth would increase from 1.1°C to 6.4°C. When we know that a difference of 4 to 6°C is enough to convert a glacial climate into a temperate one that we have seen these days, the current phenomenon is quite disturbing. Above all an increase of 2°C will lead to a temperature that has never been witnessed since over a hundred thousand years.

These days, global warming is underway and we fear that a climatic change which is a hundred times faster will take place, with consequences which will go way beyond the faculties of adaptation of man, animals and vegetation.

As far as the extreme climatic manifestations are concerned (floods, storms, heat waves, drought) noticed in Europe and notably in France during the last fifty years, they will be able to foreshadow what will happen with a higher frequency.

A priority: to henceforth reduce the increase in green house gases in order to curb the rise in temperatures and avoid global warming from accelerating; the higher the rate of global warming, the more difficult its consequences will be to control.

Besides, as a result of the length of time the green house gases will prevail for in the atmosphere and the thermal inertia of the oceans, even if we completely stopped the emission of these gases, global warming would still continue for several years after they were emitted.

To the 854 under nourished people another 100 million people who have been swinging in a precarious position have been added within a few months. Mobilization of the people is underway but the experts are already predicting the end of reasonably priced food.

This is why it is important to act fast.