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

The U.S. National Park Service on Saturday will launch over 850,000 fireworks into the skies of Washington, bathing the capital in patriotic blasts of light for the nation’s 250th birthday.

Then comes the fallout.

Scientists have well documented the soot and heavy metal pollution that can spike severely in the wake of pyrotechnic displays, and the world-record-setting number of fireworks lined up for July 4 will mean an equally large jump in pollution, according to experts and internal NPS documents reviewed by POLITICO.