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Of all the water on the planet, only 2.5% is freshwater
and so is drinkable without extensive treatment
(the rest is salt water). This freshwater is distributed
unevenly, so that some areas seem particularly prone to
drought while others have sufficient access to potable
water. Between 61% and 89% of the world’s people live
in water scarce areas (Nature, 2016). About 1.1 billion
people live in parts of the world that face both high
water shortage and high water usage (or water stress, as
it is called by hydrologists). A survey from 2014 found
that 25% of the 500 cities studied suffer from overuse
of water resources. This percentage does not look high,
but it masks the fact that very large cities are the ones
that are in danger of water depletion. These cities
include Beijing, Delhi, Karachi, Kolkata, Los Angeles,
Mexico City, Moscow, Rio de Janeiro, Shanghai and
Tokyo (Global Environmental Change, 2014).
full:
https://www.thetricontinental.org/wp-content/uploads/2018/03/Dossier-2_CitiesWithoutWater.pdf
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