Photo taken on July 21, 2020 shows a cellphone charged through a system of solar panels and USB ports on one of the umbrellas at an open public beach near the city hall of Vari-Voula-Vouliagmeni municipality in southern Athens, Greece. As of Tuesday, the dozens of umbrellas scattered along the beach, in line with the safe distancing measures for protection against COVID-19, are fitted with a system consisting of solar panels and USB ports offering free of charge and environmentally friendly charging. Under a pilot program launched on Tuesday, sunbathers will be contributing to energy-saving efforts using solar energy and will be able to see how much electricity was saved on a website run by the scientists of the Institute of Communication and Computer Systems (ICCS) of the National Technical University of Athens. (Photo by Lefteris Partsalis/Xinhua)
