Project
Desertification in China
Desertification is one of the most important environmental challenges facing the world today...
Fighting the war against sand - Outlook talks to the photojournalist who has travelled across the spreading deserts of China where more and more people are becoming environmental refugees - it's now estimated that almost one fifth of China's land area is now desert.
Gallagher's interview begins at 16:56.
Listen to the interview on BBC World.
