( February 4, 2026, 11:50 AM EST) -- WASHINGTON, D.C. — The Natural Resources Defense Council (NRDC) joined a Minnesota environmental group in filing a lawsuit in District of Columbia federal court over another of President Donald J. Trump’s proclamations that used a previously untapped provision of the Clean Air Act (CAA) to, this time, exempt “the entirety of the taconite iron ore processing industry” from recently implemented U.S. Environmental Protection Agency emissions regulations for two years....