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Scientists have unearthed a [previous / previously] unknown species of microbes in the earth beneath [them / us] . Researchers at Michigan State University have been exploring an area just below and above the Earth's surface called the Critical Zone. This zone is [essential / essence] to providing the conditions that [retrain / sustain] life. The researchers called the microbes CSP1-3. The microorganisms could be a [key / quay] part of the process of purifying our [watery / water] . Microbiologist James Tiedje said that while layers of [foil / soil] are responsible for much of the [filtration / fluctuation] of rainwater, CSP1-3 are also indispensable. He said: "CSP1-3 are the [scriveners / scavengers] cleaning up what got through the surface layer of soil." They [have / get] a job to do to purify our drinking water.

Dr Tiedje and his team focused [in / on] the microbes living in the [depth / deep] soil, up to 200 metres beneath our [foot / feet] . He said the CSP1-3 microbes remove harmful contaminants and [delirium / detritus] from the water supply. He now wants to cultivate CSP1-3 in his lab to find out more about their [real estate / properties] . He believes they could be utilized to clean up pollution [at / in] the soil. He said: "We don't know their capacities [at / for] metabolizing tough pollutants and, if we could learn that, we can help solve one of the Earth's most [pressing / passing] problems." The scitechdaily.com website said: "Understanding this newly [funded / found] group could boost conservation efforts and help [post / address] climate change."