Environment in Aachen 13 indicators covering environment for Aachen. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -3 Percentage change 2025 down 1,600.0% 676th Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.03 Tonnes of CO2-equivalent 2024 down 25.0% 590th Total and environment-related patents - FUAs — Patent applications 265.4 Patents 2022 up 51.5% 62nd Land surface temperature - Cities and FUAs — Daytime summer land 26.43 Degrees celsius 2024 down 15.1% 1105th Land surface temperature - Cities and FUAs — Daytime winter land 2.39 Degrees celsius 2024 down 15.0% 1187th Land surface temperature - Cities and FUAs — Daytime yearly land 17.39 Degrees celsius 2024 down 12.9% 1189th Land surface temperature - Cities and FUAs — Nighttime summer land 13.15 Degrees celsius 2024 down 6.0% 1140th Land surface temperature - Cities and FUAs — Nighttime winter land -1.75 Degrees celsius 2024 up 46.2% 957th Land surface temperature - Cities and FUAs — Nighttime yearly land 7.11 Degrees celsius 2024 down 1.5% 885th Air pollution - Cities and FUAs — Population exposure to nitrogen 39.82 Microgrammes per cubic metre 2025 — 452nd Air pollution - Cities and FUAs — Population exposure to ozone 87.45 Microgrammes per cubic metre 2025 — 559th Air pollution - Cities and FUAs — Population exposure to PM10 36.14 Microgrammes per cubic metre 2025 — 758th Air pollution - Cities and FUAs — Population exposure to PM2.5 26.26 Microgrammes per cubic metre 2025 — 714th