Russia's state-owned natural gas company says the U.S. shale-gas boom is economically unsustainable — and it's buttressing its claim with financial data collected by an American consulting firm located less than 20 miles from the White House. Moscow-based Gazprom, the world's largest gas company, is working with Pace Global Energy Services, a consulting firm in Fairfax, Virginia, to analyze how much money U.S. gas companies are spending on hydraulic fracturing and horizontal drilling. Gazprom, citing the Virginia company's data, says the true costs of U.S. shale-gas production are upwards of 150% higher than the revenues its practitioners have been reaping in the last few years. Gazprom says this will ultimately lead to the demise of fracking-based shale-gas drilling in the US and other countries that are considering adopting it. But Gazprom's critics say the company and its unlikely Washington-area ally are spreading “myths and misconceptions” about the U.S.-led shale-gas gas boom so that European and Asian countries will not develop their own shale plays, and will instead continue to buy conventional Russian gas.