in 1870, a solar powered printing press printed over 500 newspapers an hour.
detroit three provide resources in exchange for brainpower from 100 young minds.
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many of the most unpleasant aspects of urban life are caused by cars.
The Solar Impulse project aims to circumnavigate the world with an aircraft powered only by solar energy.
Hong Kong has decided to combat the area’s pollution problems by deploying solar-powered ferries.