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Extensive farming combined with severe drought caused the Dust Bowl in the 1930s. Deep plowing on the Great Plains killed the natural grasses that kept soil in place, and the topsoil turned to dust and blew away.
Worster suggests that the causes of the Dust Bowl, like those of the Depression, lay in Americaâs economic institutions and ethos. He also implies that this case study of environmental disaster has important implications for our own age, when drought, starvation, and ecological abuse are threatening the world.