TALLAHASSEE, Fla., Aug. 31 (UPI) -- Mercury pollution gets around. Though much of it is released into the atmosphere, a significant portion is returned to ground by rain. New research suggests it's thunderstorms that play the biggest role in moving mercury.
In an effort organized by Christopher Holmes, a meteorology professor at Florida State University, scientists collected rainwater in Florida, Georgia, Vermont and Wisconsin. The samples were tested for mercury levels and matched with weather data to determine whether the rain had been delivered by a thunderstorm or rainstorm. Radar offered further details on the nature of each storm.