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 is "facing the greatest global energy security threat in history". "It is much bigger than what...