explain how the United States and Canada compared to the rest of the world according to the human development index. What does the index measure

The human development index shows that Canada and the Unuted States of America are both above the average of the world. There are more countries like Germany and Britain who are like these two countries.

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voter turnout, 2006-2012

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.