And we knew very well that there were vast mountains of copper oxides out there.

FORBES: But Every Generation Does Indeed Exhaust Its Mineral Reserves

Now, with it, we could do so from copper oxides.

FORBES: But Every Generation Does Indeed Exhaust Its Mineral Reserves

It releases nearly 500 tons each of copper and nickel oxides and 2 million tons of sulfur dioxide into the air.

FORBES: The World's Most Polluted Places

They have worked with oxides of iron, aluminium, zirconium, titanium and copper.

ECONOMIST: Bunker-busting

The third objective, efficient design, involved sandwiching the nanostructured bismuth telluride between two copper plates and then enclosing the upper plate (the one coated with the light-absorbing oxides) and the bismuth telluride in a vacuum.

ECONOMIST: Solar power