Conservation of energy refers to the principle that energy cannot be created or destroyed, only transferred or converted from one form to another. This principle is also known as the first law of thermodynamics. There are various synonyms for conservation of energy including energy conservation, energy preservation, energy sustainability and energy efficiency. Conservation of energy is a cornerstone of sustainable living and is an important concept in physics and engineering. The concept of energy conservation has become increasingly important in recent years as we face an energy crisis and seek to reduce our carbon footprint. By understanding and implementing the principles of energy conservation, we can reduce our energy consumption and contribute to a more sustainable future.