State DOT's information on roundabouts

Check out VDOT's page on Roundabouts in Virginia:

http://www.virginiadot.org/info/faq-roundabouts.asp

Happy 4th of July 2018

Fireworks use a host of undesirable chemicals to create visual sensations by producing artificial light at night that tantalizes our eyes.  For example, copper and strontium fuel the blue and red colors you see at fireworks.  Think of the instantaneous visual effect of fireworks as light pollution that overwhelms the night sky and the combustion of chemicals as the cause of spikes in noise pollution at fireworks.

UCSD professor Kimberly Prather studies the chemical composition of atmospheric aerosols  On July 4, 1995, Dr. Prather measured particles suspended in the air during fireworks celebrations in Riverside County, California.  That year she found not only lead in the air, but also spiked levels of barium, which creates the "vivid greens" in firework displays.  

Professor Prather tries "to avoid breathing that air."