World War I killed more people (9 million combatants and 5 million civilians) and cost more money ($186 billion in direct costs and another $151 billion in indirect costs) than any previous war in history
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Answer: because going to the amazon from a city you would need a boat
Explanation:
It created jobs for workers, contributed to the wealth of the nation, increased the production of goods, which eventually lead to a raised standard of living, healthier diets, better housing, cheaper mass-produced clothing, higher wages, shorter hours, and better working conditions after labor unions were formed.