This CalGoldRush site discusses the damage mercury used in gold mining has done to California's environment

Discusses the toxicity of mercury, something that has been only fully understood in recent years, and what it has been used for. Some of these applications are being discontinued as manufacturers find ways of replacing the mercury with a...

You might know that lead can be toxic, and that you can get lead poisoning from eating or inhaling old paint dust. Lead is called a heavy metal, and there are other sources of heavy metals that can be toxic, too. Silver, copper, mercury,...