Different Extraction Techniques Being Utilized To Replace Mercury

New extractive technologies are slowly being accepted as the need to eliminate mercury from the earth's environment has now become definitively apparent.
There is room for any and all technologies that achive the goal of mercury and cyanide free extraction, including gravity devices, borax, biological enzymes and our own hgp4.
It's a shame that conditions have to deteriorate over many decades to the point of no return before these technologies are adopted, but that is what usually happens when any industry is challenged to change the comfotable zone of the status quo.