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Politics : Formerly About Advanced Micro Devices

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To: combjelly who wrote (465354)	3/20/2009 8:35:44 PM
From: bentway	Read Replies (1) of 1578921

Biochar: Is the hype justified? By Roger Harrabin news.bbc.co.uk Environment analyst, BBC News Biochar in action Biochar brings benefits to soils, boosting plant growth Green guru James Lovelock claims that the only hope of mitigating catastrophic climate change is through biochar - biomass "cooked" by pyrolysis. It produces gas for energy generation, and charcoal - a stable form of carbon. The charcoal is then buried in the ground, making the process "carbon negative". Researchers say biochar can also improve farm productivity and cut demand for carbon-intensive fertilisers. There's a flurry of worldwide interest in the technology, but is the hype justified? Fertile ground A ripe whiff of sludge drifts across the sewage works in Bingen, Germany, as a conveyor belt feeds a stream of semi-dried effluent into a steel container. Behind the container, the treated effluent emerges in the form of glittering black granules. In a flash of eco-alchemy, they are turning sewage into charcoal. The charcoal is then buried to lock the carbon into the ground and prevent it entering the atmosphere. Proponents of the technology say it is so effective at storing carbon that it should be included in the next global climate agreement. (Video @ link)

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