A coalition of environmental groups from the southern and western United States is threatening to sue the federal government over plans for plutonium pit factories in South Carolina and New Mexico that would produce components for additional atomic weapons.

In a letter Tuesday to U.S. Energy Secretary Jennifer Granholm, a non-profit law firm said the government should prepare an extensive environmental study before deciding to establish pit production factories at the Savannah River Site near Aiken and the Los Alamos site near Santa Fe, N.M.

African American and Native American communities have been hurt by past activities at the nuclear sites, and President Joe Biden’s administration should consider how the production factories would add to that burden, according to the South Carolina Environmental Law Project, a non-profit legal service in South Carolina.

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