Agricultural vehicles, including tractors and harvesters, have contributed to the San Joaquin Valley's gargantuan air problem. Now they're also part of the solution.
Home to more than 4 million people, the vast San Joaquin Valley lies flat and low between the Sierra Nevada and the Southern Coast Range and has long been prone to climate hazards.
Local planning, often a reason communities of color face worse pollution, is changing in California after a 2016 law. A new study offers lessons learned for planners nationwide.
