In another blow to the burgeoning U.S. hydrogen industry, BP announced it would indefinitely suspend plans to generate hydrogen at its Whiting, Indiana, refinery, according to trade publications.

The oil and gas company had originally pitched a plan to make hydrogen and capture associated carbon emissions at the refinery as part of a regional hydrogen hub that was one of seven selected for $7 billion in federal funding by the Biden Administration.

The hubs are meant to develop into a network of facilities that produce, transport, and consume hydrogen, considered a potential alternative to fossil fuels that does not release greenhouse gas emissions when burned. However, many proposed hydrogen projects would produce hydrogen from natural gas. Skeptics have said the technology has not been proven on a large scale.

The Trump Administration has also moved to cut funding for hydrogen projects, and companies have been paused or cancelled their hydrogen plans, including an Air Products facility in New York and a Nippon Sanso project in Alabama.