'An unidentified chemical used in fracking in the United States has triggered concern after it emerged it can cause kidney and liver damage. A subsidiary of Nabors Industries Ltd pumped a mixture of chemicals identified only as "EXP-F0173-11" into half a dozen oil wells in rural Karnes County, Texas, in July.
One ingredient, a solvent, in the blend of chemicals can cause kidney and liver damage, according to information about the product that Michigan state regulators have on file.'
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