Emissions into the air

Greenhouse gas (GHG) emissions

In addition to direct CO2 emissions, Wärtsilä’s operations generate indirect CO2 emissions. In 2018, the calculated secondary CO2e emissions (location-based method) were 47,347 tons (56,002) (from purchased electricity and heat) and the CO2e emissions from flights totalled 44,652 tons (43,553). There were no biogenic CO2 emissions in 2018.

GHG emissions 2018 2017 2016 2015 2014
Emissions of carbon dioxide (t) (direct) (SCOPE 1) 59 949 57 998 57 355 63 441 57 477
Emissions of carbon dioxide (t) (indirect) (SCOPE 2) 47 347
56 002 59 697 60 317 55 989
Emissions of carbon dioxide (t) (indirect - flights) (SCOPE 3) 208 330
155 537* 168 571* 39 033 39 619
GHG emissions intensity (all) 61.5
56.1 60.8 35.30 33.10

* Includes indirect emissions from materials, energy, and flights from 2016. Pre-2016 figures only include emissions from flights.


Reduction of greenhouse gas (GHG) emissions.

Wärtsilä has taken several measures to reduce its indirect CO2 emissions. The energy efficiency commitment aims to reduce energy consumption and emissions. In addition, Wärtsilä’s focus lies on reducing travelling by implementing a strict travel policy and by using virtual meeting concepts: Skype instant messaging, which enables live chats between two people or more, Skype meetings allowing multi-person meetings from personal computers, in which presentation material can be shared, and the videoconferencing system. In Wärtsilä, Skype and videoconferences are in everyday use. Approximately 1,700 Skype conferences are arranged daily, and there are 150 video conference rooms in 46 countries. Additionally, several other collaboration tools have been taken into use. Although estimating the reductions from the above mentioned measures is not possible, several local measures have been estimated to have achieved permanent reductions of total 5,524 tons CO2e in 2018.

NOx, SOx and other significant emissions.

Air emissions are mainly caused by test runs and the painting of completed engines or other Wärtsilä products. Test run emissions consist of nitrogen oxides (NOx), sulphur dioxide (SOx), carbon dioxides (CO2) and particles, as well as small amounts of other emission components. The painting of engines and other Wärtsilä products generates VOC emissions (volatile organic compounds). Engine emissions are reduced through research and development, as well as product development and testing. These measures also generate emissions, but their results reduce the future emissions of manufactured engines.

Emissions 2018 2017 2016 2015 2014
Emissions of sulphur oxides (t) 55 62 59 63 76
Emissions of total hydrocarbons (t) 164 131 116 145 87
Particulates (t) 7 8 9 9 9
Emissions of VOC (t) 45 36 30 40 40

The primary sources of manufacturing noise are the engine test runs and the ventilation machinery on factory roofs. This noise is mostly low frequency and is therefore not easily detected by the human ear. Wärtsilä has specifically addressed the issue of noise protection using technical means and has succeeded in lowering noise levels considerably. However, noise abatement is a continuous need and requires regular monitoring.

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