Every Sunday in Bogotá, streets across the city are closed to cars and transformed into urban parks. Shirtless rollerbladers with boomboxes drift leisurely in figures of eight, Lycra-clad cyclists zoom downhill and young children wobble nervously as they pedal on bikes for the first time. This is perhaps the most visible component of a multipronged plan to clean up the Colombian capital’s air. At the turn of the century, Bogotá was one of Latin America’s most polluted cities, with concentrations of harmful particulates at seven times the World Health Organization’s limits. In the last decade the city of 8 million
4.2 earthquake felt in parts of southern Alberta
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