When Michael Webber’s Webber Research & Advisory issued its annual scorecard on the environmental, social and corporate governance (ESG) performance of US-listed shipping companies in 2020, just 42% of them were meeting its minimum standards for carbon-emissions disclosure.

That jumped to 71% a year later, and this year’s figure is expected to be even higher.

But how well they are doing when it comes to tackling their CO2 emissions remains a question unanswered by the scorecard.