Air emissions

Greenhouse gas (GHG) emissions

In addition to direct CO2 emissions, Wärtsilä’s operations generate indirect CO2 emissions. In 2021, the calculated secondary CO2 e emissions (location-based method) were 25,350 tons (34,561) (from purchased electricity and heat) and the CO2 e emissions from flights totalled 14,080 tons (11,191). There were no biogenic CO2 emissions in 2021.

GHG emissions20212020201920182017
Direct (Scope 1) (tCO2 e) 54,711
Indirect (Scope 2) (tCO2 e)36,062 34,56140,911
Other indirect (Scope 3) (tCO2 e) 89,680 107,923164,550
GHG emissions intensity (all)37.8 42.650.8

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: Teams instant messaging, which enables live chats between two or more people, and Teams meetings, allowing multiple people to interact and share presentation material from personal computers, with a video conferencing option. In Wärtsilä, Teams meetings and video conferences are in everyday use. Approximately 5,500 Teams conferences are arranged daily. There are 250 rooms globally equipped with specific Teams Room devices.

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.

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.

Nitrogen oxides (t)371 445544545 534
Sulphur oxides (t)15 47515562
Total hydrocarbons (t)203 147139164131
Particulates (t)4 6778
VOC (t)29 31374536