Urban planners are hard at work to design street lamps that will be self sustaining, and they're innovating all around the world.
As the latest spin on the trend, Japan is experimenting with lamps that are both solar and wind powered. The lower part of the structure turns and stores energy in a battery in the base of the light pole. It harnessing the solar powers of the sun during the day, and benefits from natural wind at night.
Dual Renewable Energies in the City
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