Industry on Parade Compilation #30. Educational film concerning measures taken in various industries to maintain air quality inside manufacturing plants and emissions. Exterior shot of small manufacturing plant. Man at table working with gadgets; demonstrating use of smoke detector; high school students assembling a blower. CU of photo-electric cell. Shot of working blower; CU of meter showing decline in amount of smoke; shots of decrease in smoke coming from smoke stack. Exterior shot of power plant. Interior shot of man with clip board in power plant control room; closed circuit televisions. Shot of standup vacuum cleaner being used on carpet.