Environment in Leiden 13 indicators covering environment for Leiden. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -12.5 Percentage change 2025 down 668.2% 1241st Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.01 Tonnes of CO2-equivalent 2024 down 50.0% 872nd Total and environment-related patents - FUAs — Patent applications 66.4 Patents 2022 up 9.0% 175th Land surface temperature - Cities and FUAs — Daytime summer land 26.22 Degrees celsius 2024 down 14.8% 1138th Land surface temperature - Cities and FUAs — Daytime winter land 4.17 Degrees celsius 2024 up 4.6% 978th Land surface temperature - Cities and FUAs — Daytime yearly land 18.57 Degrees celsius 2024 down 3.3% 1040th Land surface temperature - Cities and FUAs — Nighttime summer land 14.39 Degrees celsius 2024 down 1.9% 952nd Land surface temperature - Cities and FUAs — Nighttime winter land 0.7545 Degrees celsius 2024 up 238.8% 658th Land surface temperature - Cities and FUAs — Nighttime yearly land 7.76 Degrees celsius 2024 up 0.3% 740th Air pollution - Cities and FUAs — Population exposure to nitrogen 55.79 Microgrammes per cubic metre 2025 — 53rd Air pollution - Cities and FUAs — Population exposure to ozone 76.67 Microgrammes per cubic metre 2025 — 766th Air pollution - Cities and FUAs — Population exposure to PM10 45.26 Microgrammes per cubic metre 2025 — 377th Air pollution - Cities and FUAs — Population exposure to PM2.5 31.41 Microgrammes per cubic metre 2025 — 475th