In the U.S., most human exposure to mercury is the result of consumption of fish contaminated with methylmercury.
Residual mercury has been dumped into U.S. rivers and lakes, causing contamination.
mnli hypothesis: Residual mercury has been dumped into U.S. rivers and lakes, causing contamination. premise: In the U.S., most human exposure to mercury is the result of consumption of fish contaminated with methylmercury.