Emissions into the air

Greenhouse gas (GHG) emissions.

In addition to direct CO2 emissions, Wärtsilä’s operations generate indirect CO2 emissions. In 2015, the calculated secondary CO2 emissions were 60,317 tons (55,989) (from purchased electricity and heat) and the CO2 emissions from flights totalled 39,033 tons (39,619).

GHG emissions 2015 2014 2013 2012 2011
Emissions of carbon dioxide (t) (direct) (SCOPE 1) 63 441 57 477 59 631 63 762 68 897
Emissions of carbon dioxide (t) (indirect) (SCOPE 2) 60 317 55 989 57 040 54 011 56 610
Emissions of carbon dioxide (t) (indirect - flights) (SCOPE 3) 39 033 39 619 40 596 39 033 37 459
GHG emissions intensity (all) 35.30 33.10 34.50 37.70 39.10

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 three main 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 Telepresence videoconferencing system. In Wärtsilä, Skype and Telepresence are in everyday use. Approximately 1,300 Skype conferences are arranged daily, and there are 52 video conference rooms in 28 countries and 38 Telepresence rooms established in Wärtsilä premises in 19 countries.

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 2015 2014 2013 2012 2011
Emissions of nitrogen oxides (t) 553 519 549 697 765
Emissions of sulphur oxides (t) 63 76 91 145 265
Emissions of total hydrocarbons (t) 145 87 130 180 166
Particulates (t) 9 9 10 13 20
Emissions of VOC (t) 40 40 49 51 58

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.


Annual VOC emissions


Annual NOx emissions


Annual SO2 emissions


Annual CO2e emissions


Annual particulate emissions


Indirect CO2 emissions


Total hydrocarbons
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