Wang Tianchang, 78, waters a tree planted on the edge of the Gobi desert on the outskirts of Wuwei, Gansu province, China, April 15, 2021. The Wangs have been fighting desertification since they settled on barren land near the village of Hongshui in Wuwei, a city in Gansu close to the border with Inner Mongolia, in 1980. A local institution in northwest China's Gansu province, Wang and his family lead busloads of young volunteers from the provincial capital of Lanzhou into the desert each year to plant and irrigate new trees and bushes. REUTERS/Carlos Garcia Rawlins SEARCH "SAND RAWLINS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES TPX IMAGES OF THE DAY