Water scarcity is one of the biggest problems facing humanity in the next few decades.

The United Nations estimates that in 30 years a quarter of the world's population will lack access to clean water.

Some countries are already dealing with severe shortages.

Scientists in Britain say they may have come up with a solution.

Al Jazeera's Laurence Lee reports from Manchester, UK.

Code: SPORTS20. Sports Travel Discount. Get $20 Off. Promo Code: SPORTS20

More videos

Protesters scream at Fox anchor
Fox News 16 Jul 2018 12:00 CEST

Protesters scream at Fox anchor