For the world’s largest facility of its kind, Reliance Industries’ oil refinery is surprisingly hard to find. Built on the vast alluvial plains surrounding Jamnagar, a town in the northwestern Indian state of Gujarat, the refinery is flanked by thick mango groves, tree-lined private highways and a pristine company town called Reliance Greens that holds homes, parks, schools and other facilities for some 2,500 employees and their families. The massive industrial monument only slowly emerges from behind the green curtain.