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alternative energy, beauty, clean energy solutions, clean power, clean technology, climatefriendly, earthfriendly, ecofriendly, efficient, electricity, energy efficiency, energy generation, environmental, environmental benefits, environmental conservation, green electricity, green energy, hydroelectric power, hydroelectricity, hydropower, hydropower beauty, international day of clean energy, international observance, naturefriendly, power plant, powering the planet, renewable energy, renewable resource, reservoir, sustainable, sustainable development, sustainable future, sustainable power, water resources, water turbines,