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30 janv. 1960 - Air Pollution got so bad parents kept their kids out of school inside. There was efforts to control emissions of VOC. The level of greenhouse gases 315 ppm. Mean global tem was 13.9 C. 1960

Ajouté au bande de temps:

Environmental Degradation Timeline

ByCrystal
13 nov. 2018
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Date:

30 janv. 1960
Maintenaint
~ Il y a 65 ans
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