For the containment, they thought they could finally breathe... They haven't finally stopped coughing. In the 41 communes of the valley of the Arve, nestled at the foot of mont Blanc, and presented it as " the most polluted of France ", the collapse of the road traffic in the spring was, as you might expect, a massive effect on the emissions of nitrogen oxide - a gas that is irritating to the bronchial tubes, which have decreased by 50% to 70%. But the concentrations in the atmosphere of fine particles, which are responsible each year from 48 000 premature deaths in france, have barely moved : in the valleys of S...

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