The Pittsburgh Post-Gazette has an interesting article discussing recent natural gas price estimates from the U.S. Department of Energy. A sample: "As a result [of the growth of supply from shale formations], the Energy Department says the price of natural gas at the wellhead, before transportation and other costs are added, will remain less than $5 per thousand cubic feet through 2022. (A thousand cubic feet is roughly equivalent to a million BTUs.) Going further out, to the year 2035, it has lowered its estimate to $6.53, from an $8.19 estimate a year ago."