Can you please mark me as the brainliest answer and have an amazing day!
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The answer to your questions is D.
Answer:
The presence in the air of one or more contaminants in such a concentration and of such duration as to cause a nuisance or to be injurious to human life, animal life or vegetation.
Eastern Europe & the (former) Soviet Union transitioned to a:
Market-based economy.
The major purpose is to light up the night the moon reflects the sun light pon to us even when the sun is on the other side of earth