Environment in Helsinki/Helsingfors 13 indicators covering environment for Helsinki/Helsingfors. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly 1.6 Percentage change 2025 down 72.4% 271st Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.34 Tonnes of CO2-equivalent 2024 up 70.0% 131st Total and environment-related patents - FUAs — Patent applications 539.7 Patents 2022 down 23.7% 26th Land surface temperature - Cities and FUAs — Daytime summer land 25.2 Degrees celsius 2024 down 6.5% 1227th Land surface temperature - Cities and FUAs — Daytime winter land -10.75 Degrees celsius 2024 down 54.4% 1375th Land surface temperature - Cities and FUAs — Daytime yearly land 14.59 Degrees celsius 2024 down 7.2% 1309th Land surface temperature - Cities and FUAs — Nighttime summer land 13.99 Degrees celsius 2024 up 5.0% 1020th Land surface temperature - Cities and FUAs — Nighttime winter land -11.01 Degrees celsius 2024 down 17.8% 1365th Land surface temperature - Cities and FUAs — Nighttime yearly land 4.55 Degrees celsius 2024 up 23.8% 1264th Air pollution - Cities and FUAs — Population exposure to nitrogen 29.16 Microgrammes per cubic metre 2025 — 712th Air pollution - Cities and FUAs — Population exposure to ozone 89.86 Microgrammes per cubic metre 2025 — 522nd Air pollution - Cities and FUAs — Population exposure to PM10 26.4 Microgrammes per cubic metre 2025 — 1063rd Air pollution - Cities and FUAs — Population exposure to PM2.5 19.75 Microgrammes per cubic metre 2025 — 945th