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.

Project

Desertification is one of the most important environmental challenges facing the world today, however it is arguably the most under-reported. Desertification is the gradual transformation of arable and habitable land into desert, usually caused by climate change and/or the improper use of land.
November 7, 2011 /
by Sean Gallagher
Sean Gallagher discusses China's environmental crises with students and faculty at Davidson College.
March 22, 2011 / Voice of America
by Peter Sawyer, Stephen Sapienza
As part of the DC Environmental Film Festival, four films explore the conflicts tied to water issues, as part of the annual World Water Day observance.