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Blue photovoltaic solar panels mounted on building roof for producing clean ecological electricity at sunset. Production of renewable energy concept.
wood heating; falling wood pellets against black background. slow-motion about small pieces of compress wood and renewable energy sources for warm houses and hot water at home.
Engineers walking discussing blueprint in windmill farm inspecting wind turbine power station. Rotating at sunset. Slow motion
Wind turbines at sunrise in heavy fog. Wind farm generating green energy

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