From the contents: Efficiency, Environment and Sustainability.- Introduction.- Energy, Exergy, Environment, and Sustainable Development.- Efficiency and Energy Management.- The First and the Second Laws of Thermodynamics.- Introduction.- Energy Change and Energy Transfer.- The First Law of Thermodynamics.- The Second Law of Thermodynamics.- Entropy.- Exergy.- Energy and Exergy Efficiencies.- Energy and Exergy Efficiencies.- Efficiencies of Cyclic Devices.- Efficiencies of Steady Flow Devices.- Energy Conversion Efficiencies.- Introduction.- Conversion Efficiencies of Common Devices.- Efficiencies of Mechanical and Electrical Devices.- Cryogenic Turbine Efficiencies.- Efficiencies of Power Plants.- Introduction.- Efficiencies of Vapor Power Cycles.- Efficiencies of Gas Power Cycles.