If you are talking about the first air pollution problem its is A, almost about 100 years ago.
1955
The following can be A and C.
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Answer:
Today, philosophers recognize Hume as a thoroughgoing exponent of philosophical naturalism, as a precursor of contemporary cognitive science, and as the inspiration for several of the most significant types of ethical theory developed in contemporary moral philosophy.
Answer: Maryland, Colorado and Massachusetts.
Explanation: Please give brainliest if you can!
Answer:
no se la verdad, no tevuelvas americana, namas de digo. abajo los uniteds
Explanation: