1) Interface Inc. : carpet company use the products that not harm the ecology and environment.
2) Solar Towers or Solar Farm: take energy from the sun, or renew and recycle the energy from it
3) Three Gorges Dam (China): it's produce hydrological electricity power to Chinese people.
4) Wind farm (Lower Saxony, Germany): it's group of wind turbine that stand in same place and produce electricity from wind together.
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