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Water and energy. Threats and opportunities / Gustaf Olsson. IWA publishing, Jne 2012, 330 p. ISBN: 9781780400266 - € 93.15http://www.iwapublishing.com/template.cfm?name=isbn9781780400266Presentation (© IWA) :The book creates an awareness of the important couplings between water and energy. It shows how energy is used in all the various water cycle operations and demonstrates how water is used – and misused – in all kinds of energy production and generation.Population increase, climate change and an increasing competition between food and fuel production create enormous pressures on both water and energy availability. Since there is no replacement for water, water security looks more crucial than energy security. This is true not only in developing countries but also in the most advanced countries. The western parts of the USA suffer from water scarcity that provides a real security threat.The book does not aim to show “how to design” or to solve some of the very intricate conflicts between water and energy. Instead it systematically lists ideas, possibilities and a number of results. There are a few more technical chapters that act as entry points to more detailed technical literature.Part one describes the water-energy nexus, the conflicts and competitions and the couplings between water security, energy security, and food security. Part two captures how climate change, population increase and the growing food demand will have major impact on water availability in many countries in the world. Part three describes water for energy and how energy production and conversion depend on water availability...&#160;