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Mama L [17]
2 years ago
10

Why was 1990 an important year regarding air quality

History
2 answers:
jenyasd209 [6]2 years ago
3 0

Answer:

The United States took first steps to keep the air clean. Cost-effective ways to reduce pollution were emphasized. The United States created the environmental protection agency. Hope this helps

Explanation:

GenaCL600 [577]2 years ago
3 0

Answer:

Why was 1990 an important year regarding air quality? ... The United States took first steps to keep the air clean. Cost-effective ways to reduce pollution were emphasized. The United States created the environmental protection agency

Explanation:

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