Environment in Seoul 12 indicators covering environment for Seoul. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -2.4 Percentage change 2025 up 35.1% 621st Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 3.66 Tonnes of CO2-equivalent 2024 up 11.2% 8th Land surface temperature - Cities and FUAs — Daytime summer land 31.29 Degrees celsius 2024 down 5.0% 560th Land surface temperature - Cities and FUAs — Daytime winter land 3.78 Degrees celsius 2024 up 205.1% 1034th Land surface temperature - Cities and FUAs — Daytime yearly land 18.16 Degrees celsius 2024 up 2.0% 1093rd Land surface temperature - Cities and FUAs — Nighttime summer land 20.8 Degrees celsius 2024 up 0.1% 255th Land surface temperature - Cities and FUAs — Nighttime winter land -3.94 Degrees celsius 2024 up 49.6% 1135th Land surface temperature - Cities and FUAs — Nighttime yearly land 7.56 Degrees celsius 2024 up 37.1% 782nd Air pollution - Cities and FUAs — Population exposure to nitrogen 27.92 Microgrammes per cubic metre 2025 — 733rd Air pollution - Cities and FUAs — Population exposure to ozone 66.8 Microgrammes per cubic metre 2025 — 914th Air pollution - Cities and FUAs — Population exposure to PM10 27.98 Microgrammes per cubic metre 2025 — 1017th Air pollution - Cities and FUAs — Population exposure to PM2.5 17.98 Microgrammes per cubic metre 2025 — 973rd