Industry on Parade Compilation #30. Educational film concerning measures taken in various industries to maintain air quality inside manufacturing plants. Various shots of residential smoke sources: chimney, outdoor refuse burning. Indoor scene of several workers, all wearing respirators, loading dust-producing materials onto a conveyor belt; scene of ship unloading with crane; man unloading bauxite from ship hold using tractor. Exterior shot of coal mine; shot of elevator bringing coal to the surface. Scene inside laboratory; CU demonstration of the effect of a chemical agent on coal dust floating on water, then sinking. Coal transfer point scene; railroad car lifted by machine; shot of nozzles spraying coal to supress dust during the loading/ unloading process; shot of railroad car tipped and coal spilling out.