THE growing shadow fleet of tankers transporting sanctioned Iranian, Venezuelan and Russian oil is filling up with the cheapest fuel available, hindering efforts to use cleaner fuel, Reuters reports. Lloyd’s List Intelligence estimates the shadow fleet had grown to around 630 tankers from 530 a year ago, to make up 14.5 per cent of the overall global tanker fleet. Some industry estimates put the number even higher, at over 800 tankers. The numbers mark further rapid expansion following Moscow’s...