Globe and Mail: Parisians taking public transportation to work Friday were surprised and delighted to find subways and buses free for the next three days, but the reason was a bit less cheerful: Air pollution had reached an unusually high level and was expected to continue unabated through the weekend.
Bad air quality might be familiar to tourists here from Beijing or Mumbai, but in this elegant capital where strict limits on building height create the illusion of plenty of fresh air, pollution is rarely this…

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