Joe Moore / Valley Public Radio

The small Kern County community of Arvin has some of the worst air in the nation. Surrounded on two sides by mountains at the southern end of the San Joaquin Valley, the city's 16,000 residents breathe air polluted by cars, trucks and industrial operations from nearby, and from across the valley. But now some members of the community are taking matters into their own hands, with a "bucket brigade" that aims to clean up the air. But their efforts are not without controversy.