To truly understand what global warming, it is necessary to distinguish the two phenomena that breed:

The ozone layer helps to think half of the solar UV radiation, and the other half of the UV Through the atmosphere, the latter has been once again as a filter of radiation. The problem arises when the production of carbon Chlorofluoro becomes important because it destroys ozone, and therefore the proportion of solar radiation in UV Which touches the ground earth is more important.

The second element is the "greenhouse effect". The Co2, naturally produced by bovine flatulence and wetlands, infrared stop once they reflected on the earth's surface. The infrared can not retake the atmosphere and are then prisoners and therefore strongly warm air.

In March 2005, a group of 1,200 world experts gathered in the IPCC, and mandated by the UN, has planned for the twenty-first century a global average warming of between 2 ° C and 6 ° C. The consequences of this phenomenon, to become an international priority (Kyoto agreements) are a matter of geography (rising seas, repetition of brutal climatic phenomena, such cyclones…), health (back malaria related to the high humidity…) but also and above all economic.

"The house is burning and we look elsewhere," Jacques Chirac.

In France, the ski resorts are pointing the finger by the authorities as more and more, the lack of snow in the low-altitude stations will change the scale of economic reports.

In this vein, the International Ski Federation, alarmed by the too mild temperatures in Europe at the beginning of this winter, just cancel the first competitions originally scheduled in Austria; male races scheduled at Val d'Isere, they also threatened but not cancelled for the time… is about one thing, however, the World Cup skiing will be held in North America due to the good weather. Also, it is a huge shortfall afflicting the European season, to cope with the vagaries of nature, must make major investments and revise their strategies.

The solutions are most frequently observed in the Alps are snow or extension of runways at higher altitudes. These options are not possible in the region: low altitude, availability of water

Inadequate temperatures too high. Therefore, we have to turn to less conventional strategies: diversification of the tourism offer winter tourism in the year, supported by the cantons, massive increase in the prices of packages or simply retirement. At present, the stations appear to be seeking to diversify their range of services while showing a certain fatalism.

The regions, however, develop strong policies to attract tourists, with great medium (redevelopment stations to avoid departures to the Spanish stations), but feel abandoned by the authorities and must not their "survival" at the commitment that brings the population.

With this in mind, the future stations arc jurassien (stations low altitudes) seems particularly uncertain. If the warming continues, there is ample reason to believe that without involvement of genuine political power or effective management of these stations close family will no longer exist by thirty years. These losses represent a great loss for the region: rather than genuine tourist attractions, these stations are watershed economic but also a strong social bond in these remote and real bargains for people in the neighbourhood who have not able to go on holiday or engaging in other sports.