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The Front Cover

Bill Leighty argues in his article on page 6 that rather than just extending electricity grids it would be worth looking at alternatives (such as hydrogen and ammonia carried via underground pipelines) for storage and transmission of renewable energy. The image of the frontcover shows a solution-mined compressed Hydrogen storage caverns in domal salt.

Publisher's Note

American wind energy rebounded in 2014 but will this continue?


Alternatives to Electricity for Transmission, Storage and Integration of Renewable Energy
By Bill Leighty, The Leighty Foundation, Juneau, Alaska, USA

The Hexcrete Wind Turbine Towers
By Sri Sritharan, Wilson Engineering Professor, Department of Civil, Construction and Environmental Engineering, Iowa State University, USA

Measuring Low-Frequency Vibrations
By Dr Edwin Becker, Pruftechnik Condition Monitoring GmbH, Germany

View from Inside

Global Wind Hits Record Growth
Steve Sawyer, GWEC Secretary General, Belgium



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