Environment in Siegen 13 indicators covering environment for Siegen. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -3.6 Percentage change 2025 down 550.0% 738th Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.01 Tonnes of CO2-equivalent 2024 unchanged 872nd Total and environment-related patents - FUAs — Patent applications 41.1 Patents 2022 up 10.2% 236th Land surface temperature - Cities and FUAs — Daytime summer land 25.69 Degrees celsius 2024 down 13.3% 1188th Land surface temperature - Cities and FUAs — Daytime winter land 1.51 Degrees celsius 2024 up 15.6% 1259th Land surface temperature - Cities and FUAs — Daytime yearly land 18.22 Degrees celsius 2024 down 10.6% 1086th Land surface temperature - Cities and FUAs — Nighttime summer land 12.24 Degrees celsius 2024 down 12.8% 1211th Land surface temperature - Cities and FUAs — Nighttime winter land -2.9 Degrees celsius 2024 up 46.0% 1064th Land surface temperature - Cities and FUAs — Nighttime yearly land 5.39 Degrees celsius 2024 down 17.7% 1206th Air pollution - Cities and FUAs — Population exposure to nitrogen 40.34 Microgrammes per cubic metre 2025 — 439th Air pollution - Cities and FUAs — Population exposure to ozone 110.25 Microgrammes per cubic metre 2025 — 196th Air pollution - Cities and FUAs — Population exposure to PM10 35.37 Microgrammes per cubic metre 2025 — 799th Air pollution - Cities and FUAs — Population exposure to PM2.5 27.84 Microgrammes per cubic metre 2025 — 644th