STRASBOURG, FRANCE - AUG 6, 2015: People wearing air masks protesting against air pollution in Strasbourg, Alsace, France - old woman holding placard: pollution kills 50000 yearly
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STRASBOURG, FRANCE - AUG 6, 2015: People wearing air masks protesting against air pollution in Strasbourg, Alsace, France - old woman holding placard: pollution kills 50000 yearly