Title: Polluted rain
Subjects: Acid precipitation (Meteorology), Adverse effects, Congresses, Environmental Pollutants, Environmental Pollution, Environmental aspects of Acid precipitation (Meteorology), Weather, Umweltverschmutzung, Precipitations acides (Meteorologie), Environmental aspects, Umweltchemikalie, Rain, Niederschlag, Aspect de l'environnement, Congres, Rain and rainfall, Pollution, Précipitations acides (Météorologie), Congrès