Chinese photojournalist Lu Guang goes deep into China's ravaged heartlands and documents the environmental crisis that has been triggered by the nation's dizzyingly rapid economic growth and development. Exposing the droughts caused by open-cast coal mines in Inner Mongolia , documenting under-reported oil spills and sidestepping censorship over chemical pollution of rivers, Guang is a fearless documenter of truth – and his message is starting to gather force among many Chinese who question the benefits of growth when the environmental costs are so high