Date: 2011-09-03 08:05:43
URL: http://bit.ly/n2hFOA
New Internationalist Biofuels - the good, the bad and the ugly New Internationalist Methane from sewage and domestic waste in use for thousands of years. Current use: With the help of new anaerobic digesters (which convert food waste into methane gas and organic fertilizer), around 30 million homes in China and India now make their ... and more »
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