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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 jan 1981 ano - Canadian Coalition on Acid Rain

Descrição:

Agreement started.
Canada and the United States.
Reduce sulphur dioxide and nitrogen oxide emissions.

Adicionado na linha do tempo:

30 out 2017
1
0
807

Data:

1 jan 1981 ano
Agora
~ 44 years ago