How did the wall street crash lead to the great depression

The stock market crash of 1929 was not the sole cause of the Great Depression, but it did act to accelerate the global economic collapse of which it was also a symptom. By 1933, nearly half of America's banks had failed, and unemployment was approaching 15 million people, or 30 percent of the workforce.

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there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

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