FILE - In this Oct.1 2017 file photo, people watch a dancing performance on the champs Elysees avenue during the "day without cars", in Paris. In its latest initiative to reduce pollution, Paris City Hall is planning to ban gas-powered cars by 2030. The controversial move follows Mayor Anne Hidalgo's plan to ban all diesel cars from the city by 2024, when Paris will host the Summer Olympics.(AP Photo/Thiabult Camus, FILE)
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