Only around 15% of the global shipping fleet has electronically controlled main engines that are viable for conversion to alternative fuels, a new report highlights.

About 19,000 vessels of more than 25,000 grt, or 21% of the global fleet, consume 65% of all fuel used in shipping, but just 2,700 tankers, bulkers and container ships have electronic ignition.

Those vessels could cut greenhouse gas emissions by 100 million tonnes per year if they used zero-emission fuels, according to the report by the Maritime Oslofjord Alliance.