As the natural gas drilling boom based on "fracking" has spread across the U.S. from Texas to New York, ordinary householders have signed more than a million leases allowing companies to drill on their land. But bankers and real estate executives are now starting to ask what happens if they lend money for a piece of land that ends up storing huge amounts of toxic drilling wastewater.

Ian Urbina reports for the New York Times October 19, 2011. [2]