Then the tales of her workaday tantrums ... well, suffice to say, Ekta rules her 2, 000 or so staff with a rod of pure iron!

CNN: In the Field

The inner core, made of very pure, solid iron, rotates along with the outer core, dragging the Earth's magnetic field with them.

BBC: Earth's wobbles reveal deep secrets

Household waste, for example, would be reduced to pure carbon, oxygen and hydrogen, along with a handful of heavier elements (tungsten, iron, aluminium and so on) which could then be re-used.

ECONOMIST: Nuclear waste