Stripping hundreds of millions of dollars from renewable energy and efficiency initiatives is part of a broader move to undo efforts to wean the United States off fossil fuels.

The Energy Department plans to eliminate hundreds of millions of dollars in funding for major renewable and efficiency projects this year, the latest move by the Trump administration to undo efforts to shift the nation away from fossil fuels.

The cuts, which would take money away from projects budgeted for the fiscal year that ends Sept. 30, focus on solar and wind projects, as well as state and local assistance for low-income families, according to an Energy Department document reviewed by The New York Times and Democratic lawmakers in Washington. Critics argue that the moves are illegal because Congress had previously approved the funding for specific projects.

In a joint statement about the funding changes, ranking Democrats on the Senate and House energy subcommittees