When the Middelgruden offshore wind farm was built in 2000, it was the largest offshore wind farm in the world at 40 MW. Now two new farms that are respectively 125 and 205 times larger in capacity (and even bigger in terms of annual production) have been announced within days of each other. Image Credit: United Nations Photo Within days of each other, two projects have been announced which will, if completed, represent a transformation for offshore wind and renewable energy in general. Denmark has committed to building a world-first artificial island to act as a base for hundreds of gigantic wind turbines, while South Korea has given the go-ahead for an offshore farm dwarfing the largest currently in existence. Offshore wind offers some major advantages over land-based wind turbines. Some very rare exceptions aside, the wind is more constant out to sea with nothing to obstruct it. Delivering towers, blades, and turbines by ship avoids restrictions and neighbors’ objections that keep some onshore wind farms from reaching their ideal height. Consequently, offshore wind farms are usually bigger and can catch the more consistent winds at altitude, leaving far smaller gaps to be filled from polluting sources than onshore […]

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