Researchers from the Massachusetts Institute of Technology may have discovered a way to make offshore wind power more affordable. Hollow concrete balls called storage spheres are a pivotal part of the Ocean Renewable Energy Storage system that can store excess energy generated, allowing the extra energy saved to be used when it is needed. "One such 25-meter sphere in 400-meter-deep water could store up to 6 megawatt-hours of power ... that means that 1,000 such spheres could supply as much power as a nuclear plant for several hours -- enough to make them a reliable source of power," according to MIT.

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