Waste water + bacteria = clean energy

Science Magazine: For the first time, researchers have sustainably produced hydrogen gas, a potential source of clean energy, using only water and bacteria. The challenge now, scientists say, is to scale up the process to provide large amounts of hydrogen for various purposes, such as fueling vehicles or small generators. Hydrogen may be the ultimate clean fuel because burning it-in chemical terms, reacting it with oxygen-yields only water vapor. Previously, researchers have produced hydrogen gas in microbial-powered,......

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