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Forscher konnten zeigen, dass sich der Staub der Kreide lange genug in der Luft hält, dass die Person, die unmittelbar an der Tafel steht, einiges davon einatmet. Was bedeutet das für Lehrer und Schüler? Von Gábor Paál | Text und Audio dieses Beitrags stehen unter der Creative-Commons-Lizenz CC BY-NC-ND 4.0.
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