Technology giant Apple is developing two of the world’s largest onshore wind turbines in Denmark, near the town of Esbjerg along the North Sea. The 656-ft-tall turbines will produce 62 GW hours of electricity per year, enough to power nearly 20,000 homes.

The project will also act as a test site for offshore wind turbines and expand Apple’s renewable energy footprint in Europe. It follows the firm's recent completion of one of Scandinavia’s largest solar arrays—the first Danish solar project built without public subsidies.

Danish developer European Energy, which completed the 50-MW solar project, is building the wind turbines.

The two projects are part of a plan Apple announced in August to become carbon-neutral by 2030. Both projects will power Apple’s new 48,000-sq-ft data center in Viborg, which features 100% renewable energy and supports services that include the tech firm's App Store, Apple Music, iMessage and Siri.

All surplus energy will feed into the Danish grid.

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