As the world turns further and further away from fossil fuel energy sources, unconventional and renewable sources of energy, such as power generation from water sources and wind energy, are becoming more and more important. Hydropower has been around for decades, but this book suggests new methods that are more cost-effective and less intrusive to the environment for creating power sources from rivers, the tides, and other sources of water. Written by two experts in the field, it also covers wind energy and how it can be more efficiently harnessed. This groundbreaking new volume deals with modern problems of using wind energy, namely, jet currents in the atmosphere and the energy of water flows of rivers, ocean and sea currents, including those caused by tides. Wind and water-based energy sources form an essential part of the renewable energy solution. The engineering measures discussed in this book prove, for example, that by reducing the rate of dissipation of atmospheric surface low-level currents by only one percent, it is possible to provide all of humanity with energy at rates twice the per capita consumption of the wealthiest countries. Whether for the veteran engineer or the engineering student, this book is a must-have for any library.