Mobilcast.com

Do Fireworks Cause Air Pollution? Air quality on the Fourth of July. By Jacob Leibenluft Officials in Nevada warned that July 4 fireworks—combined with smoke from California wildfires—may cause unhealthy levels of air pollution. So did the weekend fireworks cause Las Vegas to exceed clean-air standards? Yes, at least for a few hours. This isn't at all unusual: State environmental agencies often report Independence Day spikes in their PM2.5 readings—a measure of the concentration of very tiny airborne particles, no bigger than 2.5 micrometers in diameter. Under federal law, a location's air qu