Song of the canary

Examines industrial illness in America. The focus is on two locales: a chemical plant in California where workers have become sterile from manufacturing a pesticide, and the cotton mills of the Carolinas where workers have contracted brown lung disease.
, Documentary about the health hazards to workers at a chemical plant in California and at cotton mills in North and South Carolina. Probes the issues of government regulation, medical research, workers' compensation and the actions of employers, unions and workers when confronted with life-threatening dangers on the job.