Tankers running on fumes as shipping fuel switch causes delays

LONDON/SINGAPORE (Reuters) - Disruption to shipping from the long-anticipated switch to more environmentally friendly marine fuels has finally arrived, exacerbated by logistical problems as much as any shortage of the cleaner fuel.New International Maritime Organization (IMO) rules, referred to as IMO 2020, aim to stop ships from using fuels containing more than 0.5% sulphur unless they are equipped with exhaust-cleaning systems known as scrubbers.From the start of January ships must load very..