The U.N. Climate Change Conference starts Thursday in Bonn, Germany, but the United States is not scheduled to be a keynote speaker.
The Trump administration has suspended new coal leasing, shuttered existing leases and halted new construction on the Dakota Access Pipeline, the nation’s third-largest oil pipeline.
The president has repeatedly blamed the drought on climate change and ordered a moratorium on new coal production.
He has said he wants to restart the oil and gas industry and bring back jobs that are in jeopardy.
But some federal agencies have begun to suspend their own coal leasing programs, including the Environmental Protection Agency and the Bureau of Land Management.
The Interior Department is holding back some coal on public lands and leasing on public land, and the Department of the Interior is suspending the leasing of federal lands for new coal.
A U.M.F. report released Monday found that there was no evidence that coal-fired power plants are causing the drought.
The agency found that coal production has been stable or declined over the last several years, but there is a need for more research on the impacts of climate change on the nation and the economy, the report said.
The report did not say when the coal moratorium would be lifted, but it is likely to happen at some point, the agency said.