the need for water

Water.
No joke.

A quarter of the world’s population across 17 countries are living in regions of extremely high water stress, a measure of the level of competition over water resources, a new report reveals.
Experts at the World Resources Institute (WRI) warned that increasing water stress could lead to more “day zeroes” – a term that gained popularity in 2018 as Cape Town in South Africa came dangerously close to running out of water.

For example: Oil built Saudi Arabia – will a lack of water destroy it?