chemicals
  • Companies that drill for oil and natural gas on federal lands will be required to disclose publicly the chemicals used in hydraulic fracturing operations.

    workers tend to a well head during a hydraulic fracturing operation at an Encana Oil & Gas (USA) Inc. gas well outside Rifle, in western Colorado on March 29, 2013
    LAST UPDATE : May 16, 2013, 6:37 PM EDT
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  • Demonstrators in the United States and other countries protested Saturday against the natural gas drilling process known as fracking that they say threatens public health and the environment.

    LAST UPDATE : Dec 08, 2012, 1:00 AM EST
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