| http://www.w3.org/ns/prov#value | - Mass production of the 1920s created overproduction, which was arguably one of several causes of the Great Depression of the 1930s.[24] Following the Great Depression, economic growth resumed, aided in part by demand for entirely new goods and services, such as telephones, radio, television, automobiles, and household appliances, air conditioning, and commercial aviation (after 1950), creating eno
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