In a major assault on human health, the Trump administration is changing the policy of the Environmental Protection Agency (EPA) regarding the control of air pollution. A review of internal EPA emails conducted by the New York Times found that consideration of the impacts of fine particulate matter (PM2.5) and ozone, two of the most prominent components of air pollution, would no longer be included as part of the evaluation of the effects of industrial air pollution on humans. A draft of the new regulation was released, signed by the EPA Administrator, Lee Zeldin, on January 9, 2026.