The impact that hydraulic fracturing, or fracking, has had on the energy picture in the U.S. has been profound. Natural gas prices have plummeted. Supplies have increased sharply. The long-term outlook for natural gas is a radical departure from historic trends, with apparently abundant supplies and low costs forecast, rather than scarcity and high prices. It’s no wonder that natural gas fracking has overshadowed almost all other energy news of the past year.