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Three times, Gro Harlem Brundtland served as Norway's Prime Minister. She was the first woman to hold this position, serving from 1981 to 1986, 1986 to 1989, and 1990 to 1996. Brundtland's tenure was marked by her focus on environmental issues and her work on the Brundtland Commission, which published the influential report "Our Common Future" in 1987.