Vocalist Laila Skovmand, a musician with Danish company Between Music, plays underwater in a tank during a rehearsal ahead of their UK premiere concert Aquasonic at the Tramway in Glasgow on Ocrober 25, 2017. (Photo by Robert Perry/PA Images)

Competitors in the Pro Bikini division pose during the Arnold Classic Australia at The Melbourne Convention and Exhibition Centre on March 14, 2015 in Melbourne, Australia. (Photo by Robert Cianflone/Getty Images)

Ocean Rebellion put on a display of puking oil heads ahead of climate change conference COP26 in Glasgow, Britain, 29 October 2021. (Photo by Robert Perry/EPA/EFE)

A red squirrel leaps over a gray squirrel after the larger squirrel became annoyed with its territory being encroached upon, Saturday, May 28, 2022, in Freeport, Maine. (Photo by Robert F. Bukaty/AP Photo)

Two girls run through the heavy rain as people head out to Wind Street in Swansea, Wales to celebrate Halloween on Monday, October 31, 2022. (Photo by Robert Melen)

The drag troupe Dabber Dolls, arriving in Glasgow Central station on September 21, 2022 for their first tour of Mecca Bingo halls, are joined by a Scottish fan. (Photo by Robert Perry/The Guardian)

To mark World Water Day, on March 22nd Solidarités International and its agency BDDP Unlimited will roll out a campaign to build awareness of the scourge of undrinkable water.