California is turning to an unusual set of environmental helpers, worms and microbes to tackle one of agriculture’s most serious pollution problems. Scientists and farmers are beginning to use these small creatures to convert livestock manure into fertilisers using a natural process that not only keeps pollutants out of the environment but also reduces greenhouse gas emissions and foul odours. The technology could help address environmental problems in California’s livestock and dairy industry, which generates millions of tons of manure each year.
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