Cruise ships showed contempt for customers by breaking clean air pledge, report says

German environment group says industry has not tried to cut pollution over the past year and reneged on a promise to install soot filters

The world's cruise ships have done virtually nothing to reduce their pollution over the past year, with some still emitting as much particulate matter as 1m cars a day, a report says.

The annual survey of 63 ships, conducted by the German environment group Nabu, refused to recommend a single one for adequately reducing its environmental impact in 2017.