Democratic lawmakers and clean energy groups who often align themselves with President Biden on environmental policy are turning against his administration’s latest green energy tax credit guidance.

In highly-anticipated guidance released late last month, the White House, Treasury Department and Department of Energy proposed rules governing tax credits for hydrogen power production, which advocates believe will be a critical tool for decarbonization. The guidance, though, tethers the Inflation Reduction Act’s (IRA) highest production credit of $3 per kilogram of hydrogen produced to strict eco standards.

“The Biden Administration’s proposal attempts to launch a green hydrogen industry while guarding against any possibility of emissions increases during initial commercial deployment,” said Jason Grumet, the CEO of the American Clean Power Association, a clean power industry group often allied with the Biden administration.