> Toxic
◉ Aluminium
◉ Arsenic
◉ Barium
◉ Cadmium
◉ Caesium
◉ Mercury
◉ Lead
◉ Tin
◉ Bismuth)
◉ Beryllium
◉ Antimony
◉ trontium
◉ Thallium
◉ Uranium
> Nutrients
◉ Cobalt
◉ Chromium
◉ Molybdenum
◉ Silver
◉ Vanadium
◉ Selenium
◉ Nickel
◉ Manganese