In Blue and Green, Scott Cummings examines a campaign by the labor and environmental movements to transform trucking at America's largest port in Los Angeles. Tracing the history of struggle in an industry at the epicenter of the global supply chain, Cummings shows how an unprecedented "blue-green" alliance mobilized to improve working conditions for low-income drivers and air quality in nearby communities. The campaign for "clean trucks," Cummings argues, teaches much about how social movements can use law to challenge inequality in a global era.

Cummings shows how federal...