President Donald Trump’s administration reportedly plans to reclassify high-level radioactive waste scattered around the U.S. in order to make it easier and cheaper to dispose of.

The Department of Energy intends to relabel high-level radioactive waste left over from the production of nuclear weapons as low-level, the Associated Press reported.

Currently, high-level radioactive waste is defined as that which is a byproduct of fuel reprocessing (where leftover fissionable material is separated from the waste) or from nuclear reactors.

Low-level waste, on the other hand, represents around 90 percent of all such waste, according to the American Nuclear Society, and generally comes from facilities where radioisotopes are used, such as nuclear power stations, and local hospitals. Items often include wipes, clothes and plastic.

In the U.S., 90,000 metric tons of nuclear waste is being temporarily stored as successive administrations have grappled to find a long-term solution. Storing nuclear waste safely presents a number of challenges: it needs to be protected from natural disasters, and stopped from seeping into the surrounding water and soil, while its radiation blocked. Thieves must be kept from accessing it, and so too future generations who may not understand how toxic such materials are.

The Associated Press reported the agency said the reclassification would shave $40 billion off the cost of cleaning up after the production of nuclear weapons.

A Department of Energy official told Newsweek it is requesting public comment on its interpretation of the meaning of the statutory term of high-level radioactive waste through the federal register. It based the consultation on reports and recommendations by outside entities, including the Government Accountability Office, Energy Communities Alliance, National Research Council, MIT, and the Blue Ribbon Commission on America’s Nuclear Energy Future, the official said.