Answer:
Air pollution
Explanation:
In the past, humans were rarely sick with colds or other viruses connected with the air pollution, now we have to go to provinces to take in fresh air, because in the cities we mostly breathe smokes from cars or from factories.
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Answers & Comments
Answer:
Air pollution
Explanation:
In the past, humans were rarely sick with colds or other viruses connected with the air pollution, now we have to go to provinces to take in fresh air, because in the cities we mostly breathe smokes from cars or from factories.