HANOI, Vietnam (AP) — The war in Iran is exposing the world’s reliance on fragile fossil fuel routes, lending urgency to calls for hastening the shift to renewable energy. Fighting has all but halted oil exports through the Strait of Hormuz , the narrow waterway that carries about a fifth of the world’s oil and liquefied natural gas, or LNG. The disruption has jolted energy markets, pushing up prices and straining import-dependent economies . Asia, where most of the oil was headed, has been hit