They had three children: Ceres, David, and Zoe. In 1971, Duskin started a ballot measure called Proposition T, which would have limited the height of buildings in San Francisco to 72 feet. Duskin compared high rises to "tombstones", and said that "the city was being controlled by developers". He took out full-page newspaper ads publicly denouncing turning San Francisco into "a skyline of tombstones"] and predicting "The Manhattanization of San Francisco", with dramatic photos comparing the low San Francisco skyline to New York City's mighty towers. The mayor at the time, Joseph Alioto, called him an "irresponsible extremist". Duskin's measure ultimately failed, with only 37.8% of voters supporting the proposal. Duskin launched another referendum in June 1972, which would have imposed limits 60 feet. That initiative garnered 43.2% approval of voters. Duskin announced that he would launch a third initiative that specified a limit of 40 feet, and that voters were clearly moving to a majority anti-high rise position. In 1973, the San Francisco board of supervisors voted to limit building heights in the residential neighborhoods, permitting skyscrapers only in the downtown financial districts. In 1977, Duskin became a senior aide for energy legislation in the US Senate, working in the office of Senator James Abourezk of South Dakota. In that position he wrote the amendments to the Windfall Profits Tax Act that established a 15% tax credit on the price of wind and solar equipment. As there was already a 10% tax credit on the purchase of any business equipment, the combined 25% credit was crucial to the launch of the wind and solar industries. In 1979, Duskin left the Senate and co-founded US Windpower. He moved back to California and uncovered, before any of his competitors, a government study identifying Altamont Pass as the ideal location in California for wind farms. Duskin leased land in the Altamont Pass where US Windpower built one of the first wind farms in the United States. In 1983, Duskin accepted a position as CEO of Northern Power, a specialist in remote power for telecommunications and defense. Northern built projects in Antarctica, Pakistan, and Norway. In 1986, he decided to leave the wind business and work on the lessening of Cold War tensions by developing joint ventures with industrial firms in the Soviet Union. With John Eastwood, an expert in hydropower, he formed the Bering Company and partnered with Electrosila and Leningrad Metal Works in a joint venture that built hydropower stations on the Hudson River and for the city of Tacoma, Washington.