President Joe Biden signed a new law that bars the US from importing uranium from Russia, in the hopes of jumpstarting domestic mining to fuel nuclear reactors. The law also unlocks $2.7 billion in federal funding to shore up that domestic supply chain, which Congress previously approved pending limits on imports from Russia.

Russia has historically been one of the biggest suppliers of uranium to the US and other countries. When the US banned coal, oil, and gas imports in response to the war…