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A new renewable energy project has been planned for Scotland to employ a series of tidal energy turbines. The 98 foot tall turbines will be immersed 30 feet below the surface of the ocean in areas with strong tidal currents. The constantly moving water will drive the 66 foot turbine blades slowly enough...

A company called Coskata has been working on a process to produce ethanol from waste such as lawn clippings, wood chips, garbage, and other products that would normally pile up in landfills. They are working on a bioreactor that uses anaerobic bacteria to break down this biomass and convert it into ethanol...