Directional drilling and hydraulic-fracturing technologies are dramatically increasing natural-gas extraction. In aquifers overlying the Marcellus and Utica shale formations of...

At current estimates of recoverable natural gas of more than 489 tcf, the Marcellus Shale is considered to be among the largest natural gas reserves in the world. The...

The Alternative Fuels database is a geographic point database of fueling facilities that offer fuels other than gasoline in the United States. The dataset provides users with...