While Colorado’s drilling boom produces record amounts of gas and oil, the multiplying wells also are bringing up far greater quantities of a salty, toxic liquid waste — 15 billion gallons a year.
If cleaned properly, all that liquid could become safe water to restore rivers, irrigate food crops and sustain communities in an era of drought and declining water supplies. Or at least it could be reused by oil and gas companies to reduce their draw of fresh water from farmers and cities.