Salty farms for storing global carbon.
An estimated 2.6 million square kilometers would be available for these "biomass farms," divided about equally between ocean waters on the continental shelf and the world's inland salt deserts, according to a February report by the Electric Power Research Institute (EPRI) in Palo Alto, Calif. To keep the carbon they've incorporated from returning to the atmosphere, mature plants must be harvested and buried in a way that largely prevents decay. Seaweeds might be stored in ocean sediments, though no one has yet devised a cost-effective way to do that, says Louis F. Pitelka, a plant ecologist with EPRI. As a result, he says, the report concludes that salt-tolerant plants, known as halophytes, "appear to be a more effective medium for carbon storage than seaweed." With funding from EPRI and a Southwest electric utility, researchers in Arizona have begun to investigate the uptake and storage of carbon by halophytes that are simply plowed into desert soil at maturity.
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|Title Annotation:||trapping carbon dioxide in seaweed or in salt-tolerant desert brush|
|Date:||Mar 16, 1991|
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