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Air emissions

Greenhouse gas (GHG) emissions

In addition to direct CO2 emissions, Wärtsilä’s operations generate indirect CO2 emissions. In 2019, the calculated secondary CO2e emissions (location-based method) were 40 911 tons (47 347) (from purchased electricity and heat) and the CO2e emissions from flights totalled 34 700 tons (40 945). There were no biogenic CO2 emissions in 2019.

GHG emissions 2019 2018 2017 2016 2015
Emissions of carbon dioxide (t) (direct) (SCOPE 1) 56 568 59 949 57 998 57 355 63 441
Emissions of carbon dioxide (t) (indirect) (SCOPE 2) 40 911
47 347 56 002 59 697 60 317
Emissions of carbon dioxide (t) (indirect - flights) (SCOPE 3) 164 550
208 330 155 537* 168 571* 39 033
GHG emissions intensity (all) 50.8
61.5 56.1 60.8 35.30

* 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/Teams instant messaging, which enables live chats between two people or more, Skype/Teams meetings allowing multi-person meetings from personal computers, in which presentation material can be shared, and the videoconferencing system. In Wärtsilä, Skype/Teams and videoconferences are in everyday use. Approximately 1 700 Skype/Teams conferences are arranged daily. Traditional video conference system exists in 160 rooms in 49 countries, and as a new expanding solution there are 50 Skype/Teams rooms in a few countries. In 2019, we managed to reduce emissions from business flights by 15%, or 6 245 tons CO2e from the previous year.

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 2019 2018 2017 2016 2015
  Emissions of nitrogen oxides (t) 544 545  534 500 553
Emissions of sulphur oxides (t) 51 55 62 59 63
Emissions of total hydrocarbons (t) 139 164 131 116 145
Particulates (t) 7 7 8 9 9
Emissions of VOC (t) 37 45 36 30 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.


? 2021 W?rtsil?
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