If the company fails, the United States would need to buy key products from China and Russia.

A key producer of chemicals, lithium, and magnesium critical to United States defense efforts has filed for Chapter 11 bankruptcy after a dispute with the state of Utah.

The filing comes after Utah’s Division of Forestry, Fire & State Lands said it was seeking to terminate the company’s leases to operate in the state. Utah has blamed the company U.S. Magnesium for pollution, based on an academic review.

“The study from the Cooperative Institute for Research in Environmental Sciences came from a period of winter air pollution in 2017 and showed that the plume from the U.S. Magnesium refinery along the Great Salt Lake produced ‘emissions of chlorine and bromine, known as halogenated compounds, [and] were significant contributors to the persistent winter brown clouds,’” Fox 13 reported.