Final answer:
In the former Soviet Union, mikrorayons were large housing projects built in the 1970s and 1980s.
Step-by-step explanation:
In the former Soviet Union, the mikrorayons were large housing projects built in the 1970s and 1980s. These housing projects were characterized by large apartment buildings and were typically located on the outskirts of cities. They were designed to provide affordable housing to the growing urban population.
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