The roof underside of 7.75 kWp solar photovoltaic array panels in Osney Lock Hydro on the River Thames, in Oxford, England, United Kingdom. It is the first community owned hydropower scheme to be built on the River Thames, set up by local residents in 2002, it generates clean, green electricity. The solar panels generate 6,665 kWh of green energy annually. photo by Andrew Aitchison / In pictures via Getty Images
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