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  Blazing the Biogas Trail

Guangxi in southern China. A fat, grunting sow feeds her piglets; they look plump and healthy. But things are not as jolly as they might seem. Over the next 12 months, this sow and her piglets will, according to one estimate, release 9 tonnes of carbon dioxide into the atmosphere through the methane generated by their droppings. Read more...

Source: Discovery Channel Magazine, April 2009

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