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Thus, the results of the recent study by ADEME on the perception of the greenhouse effect show a rising awareness of the phenomenon in society. We must also realize that benchmarks and scales benchmark space have moved. Thus, everyone can "see" the physical world as a whole thanks to satellite imagery and view daily weather phenomena on his television screen.

But what perception people have of this phenomenon on a daily basis? First, any natural phenomenon deviating a little of the "normal" is attributed by the media to climate change, and this as a matter of course, without attention to any other factor "normal". Furthermore, what we promised, that is a future disasters .

While the ideologies of the 20th century and advances in science promise "of future singing", where it would be possible to "shave gratis" Today, we announced pell-mell, floods and droughts, coastal areas inundated, displacement, destruction of infrastructure, etc.. Our environment, our economy and our companies will be permanently affected. Not only a "change" but a "revolution".

Climate change would be accompanied therefore a "disorder". But that would mean that weather conditions have been stable in the past, and now that the rule would be the occurrence of extreme events. Certainly not, because it settles forget that before this he was already aware mentioned among older people the time of past years, with "seasons marked", "real" winters and "true" summers, evocation accompanied by the popular expression: "There are no more season! ".

However, analysis of climate at a given place over several decades shows that if there is a constant ... is the variability of years in a succession of the seasons. None years is like a year "average" is what Jackie Puech, a researcher at the Agronomy Research Unit of INRA in Toulouse, illustrated by postponing carefully on a graph, from 60 years, rainfall and Daily temperature and deficits or surpluses of water for crops in successive seasons.

In fact, researchers at Meteo France are cautious in the presentation that they are the results of their work (see interview with Olivier Moch, Meteo France). They run different models in their computers to try to simulate the future in calibrating on forecasts that they can give from the weather of past years. And they first say: "Our models are converging on the idea of an increase in average temperature, with variations depending on the model."

But what consequences for the climatic conditions of a given place? They say again, with caution: "If there is climate change, years of heatwave type 2003 will be more frequent from 2050." Or, "The frequency of cyclones type Katerina will be higher." But in a given location and level of living of its population, objective assessment of a frequency is not obvious.

Another issue still deserves to be asked: What is the function of speech catastrophic and media hype which is the subject climate change? Answer: it requires a collective awareness - that is teaching Film Al Gore. But awareness for what purpose? In fact, our destiny is already outlined by a phenomenon initiated by our industrial societies and the exploitation of fossil carbon deposits.

There would be no escape even if today we reduce our emissions of greenhouse gases! At best, any "fight against climate change" could not qu'éviter an amplification of the phenomenon. Décourageant is not it! So, what other attitudes can we think and explore? A serious runway is to propose and to focus now practices providing an adaptation to the variability of weather what they are, reducing the vulnerability of our modes of production, our conceptions of habitat and our logic shift.

The case of agriculture deserves special attention. Indeed, integrate farmers in their job for a long time since this logic of adaptation, realizing the long seasons of "tactical adjustments" within routes production techniques that they have chosen to achieve the best harvest in possible conditions, so that one year is like no other meteorologically.

They may also ask the following question: to what extent the phenomena related to climate change could they lead to make a "strategic shift" of their production model? Agriculture "environmentally intensive", advocated by Michel Griffon, is the choice of failure. It should also be noted that the rising cost of fossil energy will be the first positive result, in the short term, focus on saving behaviour, and this without having to brandish considerations of a global or moral.