BILLINGS, Montana — The Biden administration is advancing its plan to restrict logging within old-growth forests that are increasingly threatened by climate change, with exceptions that include cutting trees to make forests less susceptible to wildfires, according to a U.S. government analysis. The analysis, which is expected to be published Friday, shows that officials intend to reject a blanket prohibition on old-growth logging that’s long been sought by some environmentalists. Officials concluded that such a sweeping ban would make it harder to thin forests to better protect communities against wildfires that have grown more severe as the planet has warmed. The exceptions under which logging would be allowed are unlikely to placate the timber industry and Republicans in Congress. …“There’s so little timber sales that occur right now in old-growth … that the overall effects are very small,” Forest Service Deputy Chief Chris French said.