AdvertisementMongolia's Long Road To Mining WealthJuly 31, 2019Emily KwongfacebookEmailGulnara Dariiga, 38, drives a truck piled high with coal as she waits to cross the border. A mining boom in the Gobi Desert is fueling cross-border trade between Mongolia and China, with millions of tons of coal, copper and precious minerals moving by the truckload every year. (NPR)