But it is critical when it comes to replacing carbon-intensive chemical feedstocks that create products like ammonia, which is used to make fertilizer. Ammonia production alone accounts for roughly 2 percent of global energy consumption and 1.5 percent of greenhouse gas emissions. Green ammonia could also aid in decarbonizing global shipping, which produces another 3 percent of global emissions.
Under the Biden administration, MACH2 made a show of partnering with SEPTA, Philadelphia’s public transit system, to test hydrogen-powered buses. In the hub’s application, though, it was made clear that the main offtakers for MACH2 would, at least initially, be area oil refineries — a tough sell for community and environmental-justice groups, which were already concerned about hydrogen’s high flammability and its potential to serve as an indirect greenhouse gas, magnifying the effects of methane, ozone, and water vapor.
The second Trump administration gutted the Inflation Reduction Act, which invested billions in clean energy and incentives, but most of the hydrogen hubs were spared, at least on paper. Two hubs slated for California and the Pacific Northwest lost funding early on and remain mired in a legal battle, but the generous 45V hydrogen tax credit survived, albeit on a truncated timeline. Although it was initially reported that MACH2 was on the chopping block, Energy Secretary Chris Wright announced in April that the hydrogen hubs would retain their funding — but to what end is entirely unclear.
“What matters in the U.S. more than hub status is whether individual projects are going ahead,” Martin Tengler, head of hydrogen research at BloombergNEF, told Inside Climate News in an email. Producers need to both find customers for their hydrogen and meet the deadlines to claim the 45V green-hydrogen tax credit and the 45Q carbon-capture credit, in the case of blue hydrogen hubs. “All these have been a challenge, except 45Q,” said Tengler.
Producers now have until December 31, 2027 to begin work before the tax credits expire, rather than the original deadline of 2032. That deadline seems all but impossible to meet, especially given the fact that the DOE does not plan to spend any more on the hubs this year, according to its July apportionment plan. ARCH2 could choose to take advantage of the 45Q tax credits for carbon capture, which don’t expire until 2033, but like MACH2, it’s only drawn about one-fifth of its total Phase One award money, “a drop in the bucket of the overall award,” said Torres.
Despite their funding reprieve, it’s not clear that the hubs will be able to hold on to that money over the next few years. The 2027 President’s Budget Request released in April calls for “permanently cancelling” unobligated funding for clean hydrogen programs and repurposing “Green New Scam funding” in favor of baseload power upgrades and spending $1.2 billion on the construction of seven AI supercomputers at Argonne and Oak Ridge National Laboratories.
As a green hydrogen hub, MACH2 was dependent on the development of solar and offshore wind in order to operate. Although some solar projects are still moving forward, the American offshore wind industry has been effectively kneecapped over the last two years by the Trump administration.
Atlantic Shores Offshore Wind and Invenergy backed out of their contracts in 2025 amid delays and regulatory uncertainty, and early-stage products were abandoned after the Trump administration began paying companies out of their offshore-wind leases. In April, the New Jersey Board of Public Utilities announced that it would no longer be building infrastructure to connect offshore wind to the grid. As a blue hydrogen hub, ARCH2 existed largely as a way for oil and gas to continue operating under stricter emissions regulations — somewhat redundant now that the Trump administration has moved to scrap emissions regulations for power plants entirely.
This was always part of the problem with the Biden administration’s initial plans, said Anika Juhn, an energy data analyst at the Institute for Energy Economics and Financial Analysis. Even if the government is willing to temporarily subsidize the production of clean hydrogen, that support won’t be enough unless there are complementary incentives on the demand side.
“The hydrogen story is really an ammonia story, in the U.S. at least,” said Juhn. Without subsidies to offset the increased cost of buying clean fertilizer for farmers, it’s difficult to build up a domestic market — meaning any green ammonia that is produced in the United States will ultimately be shipped overseas.
For the green steel industry, it’s a major setback, said Hilary Lewis, steel director at Industrious Labs. “I think it’s kind of surprising to folks that we still make steel the way that you imagine in your head — big, hot furnaces, with hot metal flying everywhere, dirty coal going in, and lots of pollution,” said Lewis. “That’s still how we do it. It’s how we’ve been doing it for centuries.”
Some indirect progress has been made toward cleaner steel, although not in Pennsylvania. Those old-fashioned furnaces Lewis described are known as blast furnaces: aging, inefficient, and impossible to run in an emissions-friendly way. The more modern furnaces, which are known as direct-reduced-iron furnaces, are also significantly cleaner. At the moment they run on methane, but a facility like the $5.8 billion steel mill being built by Hyundai in Louisiana could eventually be converted to green hydrogen. “There are two steps to modernizing Pennsylvania’s iron and steel industry: one is getting clean hydrogen available,” said Lewis. “And the other is building these new furnaces to replace the existing coal-based furnaces.”
In the meantime, Torres said, many former hydrogen hub partners are pivoting to the energy cause du jour — data centers. He pointed to the Adams Fork Energy Project in West Virginia, which was initially conceived as a coal-to-gas facility. In 2023 it joined the ARCH2 hub as a partner with plans to build a massive ammonia hub, but was later dropped from the project. This year, the same company pivoted to constructing gas plants to power a data center. At least four other former ARCH2 partners — Hog Lick Aggregates, EQT, Fidelis New Energy, and CNX Resources — have joined them.
“Whenever someone’s reaching out about the hydrogen hub, [I assume] something must be happening that I don’t know about,” said Torres. “Because it’s all gas plants and data centers now.”
