However, with the current high cost of gold and relatively inexpensive
liquid mercury, small-scale gold mining has taken over as the primary
source of human emissions of mercury. Mercury is used to separate gold
from rock deposits, and is often done in a manner that results in the
miners and the local environment being exposed to toxic levels of
mercury, according to the report.
http://www.usgs.gov/newsroom/article.asp?ID=3707
No comments:
Post a Comment