Natural gas is now flowing so fast into U.S. pipelines that the big question seems to be what to do with it all: Engineer cars to run on methanol? Reopen shuttered chemical plants that rely on gas for feedstock? Export liquefied gas by tanker? With about two-thirds of U.S. states thought to hold natural gas reserves, many take President Barack Obama seriously when he calls the United States the "Saudi Arabia of natural gas."
But just how much natural gas does the United States have?
A close look at the assessments shows that even the experts disagree. Most dramatically, the U.S. Energy Information Administration (EIA), the government's own analytical team, last month slashed in half its estimate for a key and large subset of reserves: the amount of gas in shale rock formations across the country.