Heger, MartinWheeler, DavidZens, GregorMeisner, CraigHeger, Martin Philipp2019-10-082019-10-082019-10-01https://hdl.handle.net/10986/32512This report answers two questions: What is the statistical relationship between vehicle density in the streets of Greater Cairo and ambient air pollution in the city? And what are the effects of—one, the opening in recent years of another metro line and an extension to it, and two, the recent increases in fuel prices—on vehicle density and ambient air pollution?CC BY 3.0 IGOAIR POLLUTIONTRAFFIC CONGESTIONPUBLIC TRANSPORTENVIRONMENTAL POLICYFUEL PRICEAIR QUALITYPOLICY SHOCKTRAFFIC DENSITYHEALTHReportWorld Bank10.1596/32512