methane schisteFrom an observation station located in Switzerland, researchers from the InfraRed Group of Atmospheric and Solar Physics of the University of Liege have identified a potentially worrying phenomenon that could lead to air quality degradation: since 2009, the level of ethane in the atmosphere has increased by 5% per year while previously, it was decreasing by 1%. The explanation for this increase can be found several thousand kilometers away in the United States where the massive exploitation of shale gas contained underground is certainly not without consequences.

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