CHARLESTON, W.Va. (WCHS) — West Virginia exports more coal to China than any other state and some producers have expressed serious concerns over a potential trade war.

Countermeasures to President Donald Trump’s 10% tariff have some West Virginia coal producers on edge as China fired back with a 15% tariff on coal imports.

The Mountain State exports about 6 million tons of coal to China each year, making up roughly half of all U.S. coal exports to China.

"They could have a dramatic impact. They could evolve to the point where even furloughs of mining operations are considered, " West Virginia Coal Association president Chris Hamilton said.