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The answer, experts said, is not a very effective one. The US only has a limited ability to destroy an incoming nuclear intercontinental ballistic missile, a study released last month by the American Physical Society concluded.
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Answer: A primary positive effect of the Columbian Exchange is increased food supply of both the Old World and the New World. Various crops such as wheat, barley, and rye, were introduced by Columbus and his followers.
Explanation:
