California’s epic drought is pushing Big Oil to solve a problem it’s struggled with for decades: what to do with the billions of gallons of wastewater that gush out of wells every year. Golden State drillers have pumped much of that liquid back underground into disposal wells. Now, amid a four-year dry spell, more companies are looking to recycle their water or sell it to parched farms as the industry tries to get ahead of environmental lawsuits and new regulations. The trend could have implications for oil patches across the country. With fracking boosting the industry’s thirst for water, companies have run into conflicts from Texas to Colorado to Pennsylvania. California could be an incubator for conservation efforts that have so far failed to gain traction elsewhere in the U.S. Drillers may have little choice. The state’s 50,000 disposal wells have come under increased scrutiny this year, after regulators […]