A decade since the start of a shale gas revolution that unlocked new supplies and resulted in a “wholesale turnaround” in U.S. production, the overall size of recoverable gas reserves continues to increase and the pace of production growth is only accelerating, a new report by IHS Markit says.

The most dramatic effect has been on the U.S. electric power industry, the report says. Where coal and nuclear had previously dominated the growth in share of U.S. electric power generation, natural gas has become a “backbone of electric generation” and regularly competes with coal for the largest share of total electric generation. By 2040, IHS Markit expects natural gas’ share to grow from almost one-third to nearly half of all electricity generated in the United States.