The results of the Environment Ship Index (ESI) introduced in Antwerp in 2011 show that the number of environmentally friendly ships calling at the Belgian port is increasing year-on-year.
The index enables ports to grant a discount on port dues for ships that make a significant contribution to reducing emissions of pollutants such as NOx and SOx.
In 2012 there were 462 calls in Antwerp by ships that qualified for the discount followed by 501 last year and 671 in the first nine months of 2015.
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