That trellis you see in this picture is made of electrical cables, and it's covered in thriving coral. Apparently low-wattage energy emissions attract limestone, which is the basis for coral growth. Now countries like Bali (where this picture was taken on Wednesday) are setting up electrical grids to regrow their dying reefs. [Seattle Times]
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This seems a hell of a lot smarter than sinking old ships and 55 gallon drums of toxic waste to form marine habitats!