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16 sett 1987 anni - Montreal Protocol

Descrizione:

International treaty to phase out ozone depleting substances. The impact was that it led to ozone layer recovery. It had an impact in a positive way because it reversed atmospheric damage.

Aggiunto al nastro di tempo:

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22 ore fa
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14

Data:

16 sett 1987 anni
Adesso
~ 37 years ago
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