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dem82 [27]
3 years ago
15

Why was 1990 an important year regarding air quality?

Computers and Technology
2 answers:
qaws [65]3 years ago
7 0

Answer:

It's C

Explanation:

fredd [130]3 years ago
4 0

Explanation:

The United States created the Environmental Protection Agency. in some ways they have did that

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