The industrial sector creates products made of metal, plastic, rubber, concrete, glass, and ceramics, among other materials. Energy is needed in industry for heating, cooling, drying, curing, melting, and electricity. Industrial heat ranges from low- to high-temperature heat. High-temperature heat is used for plastics and rubber manufacturing, casting, steel production, other metal production, glass production, lime calcining in cement manufacturing, metal heat-treating and reheating, ironmaking, and silicon extraction from sand. Low- and medium-temperature heat are used for drying and washing during food production, chemical manufacturing, distilling, cracking, pulp and paper manufacturing, and petroleum refining, among other processes. This chapter first discusses the current sources of energy used in industry, then discusses WWS replacements for these sources. The chapter also includes methods of eliminating chemical emissions from steel, concrete, and silicon manufacturing.