One of the weaknesses in the economy of the 1920s was that too many people were relying on credit to make purchases.

the overreliance of bonds and credit led to the stock market to crash and cause the economic downfall  known as the great recession

uncle sam would be tossing and turning in his grave : *)

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.