Trump plans record fireworks show; internal documents warn of smoky skies

The U.S. National Park Service plans to launch 850,000 fireworks in Washington for the nation’s 250th birthday, with internal documents warning of hazardous pollution levels. Scientists highlight risks from soot, heavy metals, and perchlorates, while the EPA stated it does not track air quality impacts for the event. Researchers express interest in studying the environmental effects but face logistical challenges.