We cannot survive without water. But for a quarter of the world’s population, there just isn’t enough. The most vulnerable are those with the least access, and even if there is enough, it’s often in the wrong place. So, Tanya Beckett asks, are we running out of water?

Experts: James Famiglietti, Executive Director at the Global Institute for Water Security at the University of Saskatchewan. Samrat Basak, Director of India’s Urban Water Programme for the World Resources Institute. Kate Brauman, Lead Scientist for the Global Water Initiative at the University of Minnesota. Daniel Shemie, Resilient Watersheds Strategy Director at The Nature Conservancy.

Presenter: Tanya Becket Producer: Soila Apparicio Researcher: Matt Murphy Production Co-ordinator: Jacqui Johnson Sound Engineer: Rod Farquhar Editor: Richard Vadon

(Image: Aerial View of Dry River in Nevada, USA / Getty Images: Bim)