Archipelagos of artificial islands [could] produce electricity, clean water and even food in the belt of warm water that passes from the Caribbean across to the south China Sea, the Indian Ocean and west Africa.
They would produce energy from ocean thermal currents, wave power, and solar, would have housing for the crews and be mostly self-sustaining, as food could be grown too. Power would be transferred to where it was needed.
50,000 of them could provide energy for the planet, designers say, and building them would be the equivalent of the WWII mobilization effort, a huge undertaking but certainly doable.
Will this idea work? Too soon to tell, but we are seeing more and more inventive, ingenious ideas like this. Certainly some of them will work, and will provide clean, renewable energy in mass quantities in the near future.