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Bob and Margaret Lee were considered futurists in 1980 when they built one of the most unusual houses in Florida, a geodesic "dome home" on the tip of Marco Island. It was powered by the sun, had its own water supply and could withstand hurricanes. But the Lees didn't plan for rising seas.
For decades, access to cheap coal-fired electricity fueled industrial expansion across the Midwest. Now, Missouri is planning the first wind-powered steel production plant, which some see as a model to slash carbon emissions from one of the most energy-intensive industries.