Photographs taken as demolition began show that the vaults of the tanks were unusually thick and built to protect precious water supplies from heavy bombardment.

Or it could be one of the planet's greatest environmental catastrophes, bringing radioactivity and sapping precious water resources.

This also makes the islanders much more aware of conserving their precious water supplies.

A highly efficient panting mechanism allows for a low rate of evaporative water loss when cooling the body, conserving precious water.

With expanding settlement beginning in the late 19th century came farming, mining, and livestock production, all of which competed for the same precious water.