Air emissions

Greenhouse gas (GHG) emissions

Wärtsilä’s GHG emissions are presented in the table below. There were no biogenic CO2 emissions in 2022.

GHG emissions, tCO2 e20222021202020192018
Scope 146,629
Scope 2 (market-based)30,705 36,06246,306
Scope 31,941,000 1,413,2001,309,800
GHG emissions intensity (Scope 1+2)14.4 19.021.621.324.1

Reduction of greenhouse gas (GHG) emissions

In 2022, the emission reduction measures and targets for the first phase (2022-2024) of Wärtsilä’s decarbonisation roadmap were confirmed. The main measures taken to reduce greenhouse gas (GHG) emissions were the purchase of green electricity in Europe, energy saving initiatives and switching the energy source for heating. During 2022, Wärtsilä's CO2 emissions were reduced by 7,391 tCO2e. 

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)380 371445544545 
Sulphur oxides (t)7 15475155
Total hydrocarbons (t)129 203147139164
Particulates (t)4 4677
VOC (t)27 29313745