Reuters: The Alaskan North Slope contains 85.4 trillion cubic feet of undiscovered technically recoverable gas from natural gas hydrates, the U.S. Interior Department estimated in a study released on Wednesday. “This is a huge source of untapped energy,” Interior Department Secretary Dirk Kempthorne said at a press conference. “These ice-like solids can be turned into usable natural gas.” The gas from Alaska’s natural gas hydrates would be enough to heat more than 100 million average …