Scarlett Zelaya, 10, of Woodbridge, VA cools off under a water mister while visiting the Smithsonian National Zoological Park on Wednesday July 21, 2021 in Washington, DC. (Photo by Matt McClain/The Washington Post)

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.

A blooming cherry tree is seen along the Tidal Basin on Sunday March 20, 2022 in Washington, DC. As Covid-19 precautions begin to lift around the country large crowds are able to once again descend upon the region for the blossoming cherry trees. (Photo by Matt McClain/The Washington Post)

Visitors at the National Zoo check out a parrotfish made from found waste from the ocean in Washington, DC on May 23, 2016. The artwork can be seen at the National Zoo until September 5th. (Photo by Keith Lane/The Washington Post)

Heat rising from the pavement distorts the view looking east on Pennsylvania Avenue NW toward the U.S. Capitol as a heat wave intensifies across the Eastern United States on June 18, 2024, in Washington, DC. (Photo by Jahi Chikwendiu/The Washington Post)

News personality Katie Couric, left, Jenna Dewan-Tatum, center, and model Chrissy Teigen mingle during the White House Correspondents' Association dinner at the Washington Hilton on Saturday, April 25, 2015, in Washington. (Photo by Evan Vucci/AP Photo)