Heavy metals naturally occur in the Earth's crust, but human activities can increase their concentration in the environment, ...

Arsenic is a naturally occurring but highly toxic element that is classified as a ... Still, the long-term effects of it in the atmosphere remain a concern and need monitoring.

The study detected arsenic in 95 per cent of samples and cadmium in all samples. Both these metals have toxic effects on human health. Zinc and calcium were the highest concentrations, and while ...

These coal ash wastes — which are a toxic slurry left over after coal is burned — contain a host of heavy metals and contaminants, including cadmium, chromium, lead, radium and arsenic, that can ...

ANNAPOLIS — Maryland is now the second state in the nation to require baby food manufacturers to test their products for toxic heavy metals like lead and arsenic. State Delegate Deni Taveras ...