The world’s biggest oil and gas producers, already cutting hundreds of jobs a week from the U.K.’s North Sea, are just warming up. BP Plc, Royal Dutch Shell Plc and Total SA are among those reducing staff, curbing investment or closing operations as oil prices that have fallen by half since June add to troubles from rising costs and aging resources. About 1,500 jobs have been lost in offshore oil and gas this year, according to Unite, Britain’s largest labor union. Ian Wood, author of a state-commissioned report into the needs of the offshore fossil-fuel business, warned that about 15,000 positions relying on the industry could disappear in months. “The […]