What is the meaning of the principle of "federalism? a sharing of power between the national state governments

a separation of powers between the branches of the national government​

A principle of government that defines the relationship between the central government at the national level and its constituent units at the regional, state, or local levels. The Constitution lists the legislative powers of the federal government. ...

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false

explanation:

not always that can be recessionary too

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.