The month-long closure of a crucial waterway for the global energy supply has sparked warnings the world is heading for problems worse than those caused by the 1970s oil crisis. Lars Jensen, a shipping expert and former director at Maersk, told the BBC the impact of the US-Israeli war on Iran could be "substantially larger" than the economic chaos seen in the 1970s. His comments follow a warning from the director of the International Energy Agency, Fatih Birol, earlier this month that the world