This week, the world’s first ammonia-powered, zero-emissions semi truck was unveiled, potentially signaling the dawn of a new era for the shipping and transportation industry. Like Tesla’s semi truck, Brooklyn company Amogy’s ammonia-powered truck holds about 900 kWh of energy. Unlike the Tesla semi, it takes just about eight minutes to refuel. And, according to Amogy, their new model has five times the system-level energy density of batteries. For some time now, hydrogen fuel cells have been touted as the future power source…