Industry on Parade Compilation #30. Educational film about the industries that salvage, reuse and recycle materials. Exterior of steel mill; pan to molten slag poured into containers. Slag poured down a hill. Mumford Company, Atlanta, Georgia; exterior shot; interior of man tending to molten slag being processed by oven/machine; CUs of processing. Two men examining plate glass. Man shovels broken glass into wheelbarrow and carries it away; shovels glass into bins; large room showing machines processing glass waste into glass fiber sheets for use in air filters.