Natural gas resources in the United States are at an all-time high, with an expected 2,384 trillion cubic feet of recoverable gas, according to a recent study. The estimate is the highest in 48 years, Bloomberg reported, and 25 percent higher than estimates from two years ago.
The study, led by Colorado School of Mines professor John Curtis, found much of the growth in U.S. natural gas assets have come from shale deposits in eastern states like Pennsylvania. Hydraulic fracturing - the process in which a mixture of water, sand and chemicals are blasted into a well to break up the hard rock formations and allowing the gas to flow - has helped the United States increase oil and gas exploration.
"It's really shale gas that has exceeded expectations," said Curtis. "Our present assessment, strengthened by robust domestic production levels, demonstrates the exceptionally strong and optimistic gas supply picture."
The School of Mines Potential Gas Committee has released a report on U.S. natural gas reserves every year since 1964, the Denver Business Journal reported.