Some heavy metals are either essential nutrients (typically iron, cobalt, and zinc), or relatively harmless (such as ruthenium, silver, and indium) but can be toxic in large amounts or certain forms.
Others are relatively harmless (such as ruthenium, silver, and indium) but can be toxic in large amounts or certain forms. Some heavy metals are essential nutrients (typically iron, cobalt, and zinc).
Some heavy metals are essential nutrients (typically iron, cobalt, and zinc). Others are relatively harmless (such as ruthenium, silver, and indium) but can be toxic in large amounts or certain forms.
Some heavy metals are essential nutrients (typically iron, cobalt, and zinc). Others are relatively harmless (such as ruthenium, silver, and indium) but can be toxic in large amounts or certain forms.