Part I - Combustion in the modern world: The Fire -- Fire for heat -- Fire for work -- Climate-neutral fuels -- Fire causes emissions Part II - Thermodynamics of fire: Heat and work change states -- Work from heat -- Working fluid as carriers of heat and work -- The irreversibility of natural processes -- Ways from heat to work -- Heat transfer Part III - The Taming of Fire: Pouring oil on the fire -- Fire use with the best possible and climate-friendly effect -- Second-hand Fire -- Heat and work without fire. .