This joint resolution would block an Environmental Protection Agency rule that found lead emissions from aircraft engines using leaded fuel endanger public health and the environment. The resolution uses the congressional disapproval process, a mechanism that allows Congress to overturn federal regulations, and if passed would prevent the EPA rule from taking effect. The rule, published in October 2023, was designed to address air pollution from general aviation aircraft that still use leaded fuel, which poses particular health risks to communities near airports and to workers in aviation. The resolution was introduced by Senators Murkowski and Sullivan, both from Alaska, a state with significant general aviation activity. If approved by Congress and signed by the president, this action would eliminate the EPA's ability to regulate lead emissions from these aircraft engines.