Answer: The Industrial Revolution.
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Answer:
Internet Answer- Deforestation has an effect on global air quality because trees release water vapor into the air which affects atmospheric temperatures and other crucial elements that keep this earth of ours ticking over nicely... This inevitably results in all of us breathing dirtier and more polluted air than we otherwise would.
Its the sun duhh (hear sourse)
The answer is the second one: Many Mongolians are pastoral nomads who raise livestock for a living.