Various exterior shots of liquid air plant, snow on ground. Summer shots of liquid air plant. Interior shots, some CUs, of details of animated demonstration board showing process for obtaining oxygen. Shots of air control board in plant, worker taking down readings. CUs of details on board. Shots of worker filling bags of fertilizer in chemical plant, sealing bags, of bags moving on conveyor, stacks of full bags in background. Shots of fiery interior of steel mill during steel making operations; we see furnaces, much fire and red hot sparks.