Energy Lessons from Ancient Rome

An Italian startup generates electricity along aqueducts

The ancient Romans used water pressure to bring the city's monumental baths and fountains to life. Today modern Romans Flavio and Valerio Andreoli are using it to produce clean power. Encouraged by generous renewable energy incentives, their company, Hydrowatt, specializes in generating electricity from turbines in aqueducts. "Without producing any kind of waste, we use energy that would otherwise be lost," Flavio Andreoli says as he squeezes his 6-ft., 3-in. frame down the stairs and into a subterranean plant the size of a two-car garage.

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