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Ostrovityanka [42]
3 years ago
13

What was the significance of the smog episodes in Donora, Pennsylvannia, and London?

Biology
2 answers:
inna [77]3 years ago
8 0
D legislation was passed to regulate pollution
Bond [772]3 years ago
7 0
Answer would be D i thnk 

brainliest 
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