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Techniques checking solar cell on the roof for maintenance. Service engineer worker install solar panel. Clean energy concept.
World Earth Day, design for an eco friendly banner, a light bulb shape with city and garden, save the planet and energy concept, paper illustration, and 3d paper.
Green energy power plant with solar, hydro, hydrogen and wind source background concept. Clean electric energy and renewable source for future sustainable world vector illustration.
Growing tree on the converging point of computer circuit board. Nature with Digital Convergence and Technological Convergence. Green Computing, Green Technology, Green IT, csr, and IT ethics Concept.

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