title: Heavily polluted cities attempt to curb traffic emissions.
authors.forename: Tony
authors.initials: T
authors.lastname: Kirby
mesh_terms: D000397:Air Pollution / Q000331:legislation & jurisprudence / Q000517:prevention & control*; D000068476:Beijing; D002947:Cities / Q000331:legislation & jurisprudence*; D006801:Humans; D007194:India; D008131:London; D018986:Motor Vehicles / Q000331:legislation & jurisprudence*; D052638:Particulate Matter; D012384:Rome; D001335:Vehicle Emissions / Q000517:prevention & control*
chemical_list: D052638:Particulate Matter; D001335:Vehicle Emissions