reflected in the expansion of this second edition from 20 to 26 chapters. The most dramatic occurrence was the Tsunami which struck Japan in March of 2011 and set off a reactor catastrophe at the nuclear power plants in Fukushima. On the other hand fossil fuel technology drives the climate change to a threatening level. So, renewable energy sources are essential for the 21st century. The increasing number of wind power plants, solar collectors and photovoltaic installations demonstrates perceptibly that many innovations for tapping renewable energy sources have matured: very few other technologies have developed so dynamically in the past years.Nearly all the chapters were written by professionals in the respective fields. That makes this book an especially valuable and reliable source of information. The second edition is extended by several new chapters such as tidal power stations, the Desertec project, thermography of buildings and more. Furthermore, the critical debate about current first generation bio-fuels is carefully reflected, and the book presents promising solutions that do not trade in food for fuel. The editors are experienced journalists and illustrate the text with simple diagrams and information boxes, printed in full-color throughout. A valuable resource for applied physicists, engineers in power technology, engineers, and anyone interested in natural sciences.

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