People ride bicycles in Halloween costumes during “Bike Kill 13” in the Brooklyn borough of New York City, October 29, 2016. “Bike Kill” is an annual gathering of builders and riders of home-made bicycles that culminates in a tall bike jousting competition. (Photo by Stephanie Keith/Reuters)

Bella Hadid prepares backstage for Savage X Fenty Show Presented By Amazon Prime Video – Backstage at Barclays Center on September 10, 2019 in Brooklyn, New York. (Photo by Ilya S. Savenok/Getty Images for Savage X Fenty Show Presented by Amazon Prime Video)

A person jumps on a trampoline before Nathan's Famous Fourth of July International Hot Dog-Eating Contest at Coney Island in Brooklyn, New York City, U.S., July 4, 2017. (Photo by Andrew Kelly/Reuters)

American singer-songwriter and actress Olivia Rodrigo accepts the Song of the Year award for “Drivers License” onstage during the 2021 MTV Video Music Awards at Barclays Center on September 12, 2021 in the Brooklyn borough of New York City. (Photo by Mario Anzuoni/Reuters)

(L-R) Madelaine Petsch, Julia Fox, Kacey Musgraves, Kim Petras and Aquaria attend the Moschino Prefall 2020 Runway Show front row at New York Transit Museum on December 09, 2019 in Brooklyn City. (Photo by Astrid Stawiarz/Getty Images for Moschino)

Graffiti is painted on the bathroom walls at a restaurant in the Williamsburg area of Brooklyn borough in New York, United States, October 1, 2015. Some 2.4 billion people around the world don't have access to decent sanitation and more than a billion are forced to defecate in the open, risking disease and other dangers, according to the United Nations. To mark World Toilet Day on November 19, Reuters photographers captured pictures of toilets in cities, towns and villages around the globe. (Photo by Shannon Stapleton/Reuters)

From London to New York! These action shots show talented athletes practising yoga poses in iconic city locations. The amazing snaps were taken by photographer Kristina Kashtanova at urban street locations in the UK and New York. The talented yogis are seen striking mind-boggling poses in the most unusual settings. Here: Yoga head stand, Brooklyn, New York. (Photo by Kristina Kashtanova/Caters News)

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.