This book aims to prove that the so-called "energy crisis" is really an entropy crisis. Since energy is conserved, it is clear that a different concept is necessary to discuss meaningfully the problems posed by energy supplies and environmental protection. This book makes this concept, entropy, accessible to a broad, nonspecialized audience. Examples taken from daily experiences are used to introduce the concept of entropy in an intuitive manner, before it is defined in a more formal way. It is shown that the entropy increase due to irreversible transformations (or "unrecoverable" energy) simultaneously determines the level of fresh energy supplies of our society and the damage that it causes to the environment. Minimizing the rate of entropy increase with advanced technologies and society organizations, and keeping it in check with appropriate energy sources, is the key to a sustainable development. Key Features • The concept of entropy, usually taught only in specialized college-level courses, is made accessible to a broad audience • Energy needs and damage to the environment, including pollutions of different kinds and climate change, are discussed in terms of the entropy increase in modern societies • The current entropy crisis is presented against the backdrop of the development of life on earth and the general evolution of the biosphere • Energy needs for food supplies, usually not taken into account in the global energy balance, are emphasized

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