The energy sector is the most significant source of greenhouse gas emissions in Finland and is therefore the key driver behind the trend in emissions. The energy sector includes emissions from fuels used to generate energy, including fuel used in transport and the fugitive emissions related to the production, distribution and consumption of fuels. In 2020, the energy sector accounted for 72 per cent of Finland's total greenhouse gas emissions (Figure 2.2). The second largest source of emissions was agriculture sector, with a share of approximately 14 per cent. Emissions from industrial processes and product use amounted to approximately 11 per cent. Emissions from industrial processes refer to sector emissions that result from the use of raw materials in industrial processes. Emissions from the waste sector amounted to four per cent of total emissions. The contribution of indirect CO emissions from atmospheric oxidation of CH4 and NMVOCs to the greenhouse gas emissions is small, about 0.1 per cent of total greenhouse gas emissions in Finland. The land use, landuse change, and forestry (LULUCF) sector in Finland was a net sink throughout the 1990 to 2020 reporting period, because greenhouse gas removals in the sector exceeded emissions. The net sink has varied from approximately 13 to 49 per cent of the annual sum of emissions from other sectors, i.e. the total emissions without LULUCF between 1990 and 2020. The most important components of the forest sink are the tree biomass growth and biomass removed from forests due to felling. Based on the National Forest Inventory (NFI), the increment of growing stock has increased since 1990 from 78 million m to 103 million m. There is less fluctuation between years in the estimated tree biomass growth, contrary to the harvest rates. In 2020, the total drain was 83 million m.