Flag bearers Bunpichmorakat Kheun and Sokong Pen of Team Cambodia during the Opening Ceremony of the Tokyo 2020 Olympic Games at Olympic Stadium on July 23, 2021 in Tokyo, Japan. (Photo by Kai Pfaffenbach/Reuters)

Team members pose during the closing ceremony of the Tokyo 2020 Olympic Games, on August 8, 2021 at the Olympic Stadium in Tokyo. (Photo by Dan Mullan/Reuters)

A tourist walks inside the Ice Palace glacier hollow at Hintertux glacier, located at around 3250 meters above sea level, in Zillertal, Austria, 02 March, 2016. The hollow's temperature remains constant at 0 degrees Celsius, in summer and winter alike, and is also used by the University of Innsbruck for scientific research projects. (Photo by Lisi Niesner/EPA)

Syrian refugee and Olympic swimmer Yusra Mardini is pictured during a training session in a pool at the Olympic park in Berlin, Germany on April 26, 2018. (Photo by Fabrizio Bensch/Reuters)

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.