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  A smartwatch that charges itself using kinetic energy from the user’s movements

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  A modern home with windows that look completely transparent but are actually harvesting solar energy

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  A city street with sidewalks that glow faintly as they capture energy from footsteps

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  A vast field of solar panels mimicking the pattern of sunflowers, their faces tilting towards the sun as it tracks across the sky

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  Large solar panels orbiting Earth, beaming energy back to the planet through laser or microwave transmissions