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Report says typical traffic levels must fall by 12% to keep NO2 within EU limits
15,000 vehicles could now face sanctions for entering Barcelona and its surroundings
Environmentalists want cars kept off streets but automotive industry stresses alternative solutions
Data from March 14 to April 30 at 129 sites across Spain shows lowest pollutant figures in a decade
Tech & Science
Council attributes drop to introduction of Low Emission Zone on January 1
PM10 particulate levels are moderate to high with situation expected to continue over weekend