Which impact did ford's expansion of mass production have?
it revolutionized production resulting in economic growth.
it exposed harmful working conditions and resulted in social reform.
it caused a rise in unemployment resulting in economic decline.
it inspired social reform protests and a rise in unemployment.

whats the question? im not quite understanding your question.

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.

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