The city's 1,200 Buildings program has been cited as a model.
Five percent of vehicles are responsible for 90 percent of toxic emissions. Now we can figure out who the culprits are.
A stark picture of the geographic relationship between the city's top polluters and its most vulnerable places.
Freight is crippling metro areas, but it's rarely part of city planning.
BRT-Lite in Lagos, zero-carbon in Masdar, recycling in Curitiba, and more.
Researchers measuring pollution during last year's 405 closure find air quality improved by as much as 83 percent.
New monitoring techniques are improving our understanding of pollution in the developing world