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Chinatown was home to between 700 and 1,100 Chinese immigrants. The passage of the Chinese Exclusion Act of 1882, which restricted Chinese immigration, slowed Chinatown’s growth. The U.S. Congress passed other exclusionary laws aimed at Chinese immigrants between 1888 and 1902, effectively reducing the number of Chinese entering the country.

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the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.