Environment in Heerlen 13 indicators covering environment for Heerlen. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -3.4 Percentage change 2025 down 326.7% 711th 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 18.5 Patents 2022 up 128.4% 366th Land surface temperature - Cities and FUAs — Daytime summer land 28.05 Degrees celsius 2024 down 17.4% 933rd Land surface temperature - Cities and FUAs — Daytime winter land 2.46 Degrees celsius 2024 down 36.6% 1179th Land surface temperature - Cities and FUAs — Daytime yearly land 18.35 Degrees celsius 2024 down 15.0% 1072nd Land surface temperature - Cities and FUAs — Nighttime summer land 15.08 Degrees celsius 2024 down 2.1% 852nd Land surface temperature - Cities and FUAs — Nighttime winter land -0.5501 Degrees celsius 2024 up 71.9% 809th Land surface temperature - Cities and FUAs — Nighttime yearly land 7.91 Degrees celsius 2024 up 0.7% 710th Air pollution - Cities and FUAs — Population exposure to nitrogen 36.51 Microgrammes per cubic metre 2025 — 558th Air pollution - Cities and FUAs — Population exposure to ozone 81.5 Microgrammes per cubic metre 2025 — 693rd Air pollution - Cities and FUAs — Population exposure to PM10 32.65 Microgrammes per cubic metre 2025 — 901st Air pollution - Cities and FUAs — Population exposure to PM2.5 24.76 Microgrammes per cubic metre 2025 — 780th