A human instinct because our instinct is survival
Answer:
D) increased haze and smog caused by auto exhaust and tire particulates.
Differences between Indus, Nile, and Yellow river valley civilizations are (please refer the attached image)
Learn more about the Indus, Nile, and Yellow valley civilizations here:
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It's more Southwest of South Korea but yeah it's South it's also East of Hong Kong