Heat serves an enormous variety of essential practical and industrial uses across human civilization. 1. Cooking and baking food. 2. Space heating for residential and commercial buildings. 3. Generating electricity in thermal and nuclear power plants. 4. Industrial manufacturing and metal smelting. 5. Glass blowing and ceramic firing. 6. Pasteurization of milk and beverages. 7. Water heating for sanitation and hygiene. 8. Drying agricultural crops and textiles. 9. Chemical synthesis and driving endothermic reactions. 10. Sterilizing medical and laboratory equipment. 11. Asphalt production and road paving. 12. Plastic molding and extrusion. 13. Paper pulp drying. 14. Distilling petroleum products in refineries. 15. De-icing aircraft wings and roads. 16. Powering steam turbines for propulsion. 17. Soldering and welding metals. 18. Food preservation through canning. 19. Kiln-drying lumber. 20. Producing cement and lime.
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