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Cuba Harvests Clean Energy From the Sea

Buoys that generate electricity from wave motion could reduce the country's diesel dependence.

This 3-foot-long energy-generating buoy was developed in Indonesia in 2012 as part of a coral reef restoration project. In Cuba, larger, more powerful versions, nearly 12 feet long, could reduce reliance on diesel.Credit: Matthew Oldfield

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Cuba, like most Caribbean island nations, depends almost entirely on inefficient and highly polluting diesel generators for electricity. But a new project using small wave-energy buoys aims to harvest clean energy from the ocean instead.

Diesel generators crank out greenhouse gases and black carbon that contribute to climate change — the very thing that threatens to swamp more than 100 communities along Cuba’s coasts as seas are expected to rise an estimated 3 feet by 2100. Marine scientist David Guggenheim is working with Cuba’s National Center for Protected Areas to reduce the country’s diesel use and the pollution that comes with it.

“These are environmentally sensitive areas, and we want to make sure we start in these places,” says Guggenheim.

The team’s plan is to gradually replace diesel generators with groups of energy-generating buoys. Each one consists of a horseshoe-shaped float and a central lever secured to the seafloor with ...

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