Scientists have found that man-made mercury pollution has reached the bottom of the deepest part of the ocean — the Marianas Trench. This has significant implications for how mercury affects the marine environment, and how it may be concentrated in the food chain. The findings, which come from two independent research groups, are presented at the Goldschmidt geochemistry conference.
Source: Human-derived mercury shown to pollute the world’s deepest ocean trenches
(News Release, EurekAlert!; June 22, 2020)
By NOAA – NOAA, Public Domain, Link
By Hussong, Fryer (1981), US government supplied image, redrawn into SVG by Vanessa Ezekowitz – http://oceanexplorer.noaa.gov/explorations/03fire/background/plan/media/xsection.html, CC BY-SA 3.0, Link
C. Mei-Ling HAMILTON - Environmental Geochemistry Issues 