what heavy metals are abundant in the environment that are hazardous to our health?

Question

your answer is highly appreciated..
this would be a lot of help for me to help the environment...

Answer 1

From wiki...
Living organisms require trace amounts of some heavy metals, including iron, cobalt, copper, manganese, molybdenum, vanadium, strontium, and zinc, but excessive levels can be detrimental to the organism. Other heavy metals such as mercury, lead and cadmium (with one exception for the latter) have no known vital or beneficial effect on organisms,

Thorium and uranium are more often referred to as "radioactive metals"

Link: http://en.wikipedia.org/wiki/Heavy_metals

Graph showing relative abundance (atom fraction) of the chemical elements in Earth’s upper continental crust as a function of atomic number: http://en.wikipedia.org/wiki/Image:Relative_abundance_of_elements.png

Answer 2

Not all the damaging metals are 'heavy'. The worst are:

barium lead zinc copper uranium radon arsenic

Answer 3

If you're talking about a natural enviornment, the answer is none.
We evolved to fit this enviornment, and are 'tuned` to it.
If you mean what metals have we released that were previously sequestered, (in sulfates mostly), take your pick.