"Mercury deposition" refers to the process where mercury, a toxic metal, is released into the environment and falls onto the ground or water surfaces. Full definition
The study finds leaf uptake of mercury to be a globally important pathway of atmospheric mercury deposition. (en.ilmatieteenlaitos.fi)
Recent declines in mercury concentration in a freshwater fishery: isolating the effects of de-acidification and decreased atmospheric mercury deposition in Little Rock Lake (pnas.org)
And, mercury from coal - fired power plants is less than 1/2 of one percent (0.5 %) of total mercury depositions from all sources. (ddears.com)