DEFINITION
Vehicles per populated land area
Units: Vehicles/Populated
Land Area (in km2)
Units: Air pollution is generally greatest in densely populated areas. To take this into account, we used the Gridded
Population of the World dataset available from CIESIN and calculated the total land area in each country inhabited with a
population density of greater than 5 persons per sq. km. We then utilized this land area as the denominator for the vehicles data.
DEFINITION: Vehicles per populated land area
Units: Vehicles/Populated
Land Area (in km2)
Units: Air pollution is generally greatest in densely populated areas. To take this into account, we used the Gridded
Population of the World dataset available from CIESIN and calculated the total land area in each country inhabited with a
population density of greater than 5 persons per sq. km. We then utilized this land area as the denominator for the vehicles data.