In a cubic kilometre of space there are about 20 particles.

Failure would result in the collapse of an estimated quarter of a cubic kilometre of unconsolidated sediment.

In total, the volume of lava and tephra emitted during the five-month eruption was estimated to be about 0.25 cubic kilometre (0.06 cubic mile).

By the early 1960s up to 50 cubic kilometres of water was being diverted for cotton irrigation.

That's 89 cubic kilometres of water.