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GalinKa [24]
3 years ago
16

How has the EPA improved air quality over the last 30 years?

Biology
2 answers:
barxatty [35]3 years ago
8 0

Answer:

a

Explanation:

all of the other options make no sence at all

were talking about air not water

also dust storms really!?

and the last one is kind of true but the first one has more detail

Mrrafil [7]3 years ago
3 0

Answer:

a

Explanation:

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