7. Rainwater
7.1 Rainwater composition
The chemical composition of rainfall was monitored by Météo-France from 1977 to 2009 at three weather stations. The study , published in June 2011, showed that :
the average pH rose steadily over the period, from around 4.6 to 5.2 (average for the three sites), indicating a drop in the acidity of the rainwater;
sulfate deposits, averaging 3 kg/hectare/year (expressed as sulfur equivalent), fell by 65% over the period 1980-2008, which...
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Rainwater
Natural mineral waters, spring waters and other waters
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