Economists for the Brattle Group, an international consulting firm in the energy sector, are advising that long-term prospects for liquefied natural gas exports from the U.S. are weakening.

Brattle’s Jurgen Weiss says the world LNG market is increasing to fuel power generating. That renewable energy sources like wind and solar are becoming cost competitive LNG for running power plants. And that that could have a big effect.

“There may be exports from facilities that are already under construction, and will be on line in the next few years. But it raises questions about how many additional export facilities will be built and how much demand there will be for LNG exports from the United States, beyond facilities already under construction.”