Winding its way through China's northern provinces of Inner Mongolia, Ningxia, Gansu and Xinjiang the 'desertification train' travels 4000 kilometers from Beijing in the east of the country to the western borders with countries such as Pakistan, Tajikistan and Kazakhstan. Passengers can witness first hand the severity of desertification in China, just by looking out of their carriage window. Passing by the drying Inner Mongolian grasslands, the rolling yellow sands of the Tengger and Taklamakan deserts and skirting the drying remains of the Great Wall of China, passengers are offered a front-row seat to the fight the country is having with its growing sands.