Regulatory hurdles are stymieing growth in natural gas production in the Marcellus-Utica basin, the largest U.S. gas-producing region, which is set to miss out on the expected boom in American liquefied natural gas (LNG) exports in the coming years. Not only is Marcellus-Utica missing the opportunity to export and monetize natural gas in a world scrambling for LNG supply, but it is also unable to provide more natural gas to the regions close to it in New England, analysts and the pipeline industry say.