toxic waste

But mining the metals requires heavy chemical use that results in toxic waste and has caused several environmental disasters.

Last month, local reports said some 20 people had been hospitalised with respiratory problems as the plant is accused of spewing toxic waste into the sea and air.

Wildlife, water and toxic waste worries have been raised by people living near one of Europe's largest illegal landfill sites as officials look at clean-up options.

The spill happened when a tailings dam, used to store toxic waste and heavy metals, collapsed into the Kafue River, a key drinking water source, following heavy rain.

One by one, delegates at the United Nations expressed support for a new panel of scientists who would advise countries on how to address chemicals and toxic waste.