Writing or publishing comments that hurts a person's reputation is known as libel (n).
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A confederation (also known as a confederacy or league) is a union of sovereign groups or states united for purposes of common action. Usually created by a treaty, confederations of states tend to be established for dealing with critical issues, such as defense, foreign relations, internal trade or currency, with the central government being required to provide support for all its members.
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Answer:
Transportation of materials, risk of natural disaster impacts, convincing people to move, drastic changes in the air at high altitudes for potential new residents, materials erode more quickly at higher elevation
Just ideas though.
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