Relative CO2 emissions
The driving factor for relative CO2 in the short term, year on year, is how full our vessels are on their sailings. This mostly depends on market forces and customer forecast accuracy beyond our control.
For 2015, our relative CO2 emissions were 31.99 grams per tonne-kilometre, up 3.22 per cent from 2014, reflecting a continued weak and fragmented market.
In the longer term, the realtive CO2 emissions over time reflect technical and operational developments. Since 2005, we have reduced CO2 per unit transported by about 20 per cent (average of past five years). Our 2015 objective of reducing CO2 emissions per tonne-kilometre by 30 per cent compared with 2005 was ambitious, and we will continue our efforts to reduce our relative CO2 emissions, working towards our new objective of a 10 per cent reduction by 2020. Total CO2 emissions
In 2015, total CO2 emissions of WWL’s ocean operations rose 7.93 per cent to 2,203,896 tonnes, reflecting an increased number of sailings and port calls due to an increasingly fragmented market.Average sulphur content
As of 2015, WWL shifted from our 1.5 per cent global average sulphur limit to a low-sulphur policy focused on limiting sulphur content in port to less than 0.1 per cent, for the benefit of human health as well as the environment. This way, we can significantly reduce WWL’s impact on human health and environment where it matters the most. At the same time, we are operating four vessels with scrubbers. Combined, this means a slight increase in the average sulphur content in fuel this year to 1.8 per cent.Average relative NOx emissions
Average relative NOx emissions for 2015 were 14.19 g/kWh, down 2.4 per cent from the previous year, reflecting the arrival of two new HERO vessels to the fleet and the recycling of two older vessels.