Environment in Rennes 13 indicators covering environment for Rennes. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -5.6 Percentage change 2025 down 211.1% 909th Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.05 Tonnes of CO2-equivalent 2024 unchanged 486th Total and environment-related patents - FUAs — Patent applications 107 Patents 2022 down 1.6% 131st Land surface temperature - Cities and FUAs — Daytime summer land 28.88 Degrees celsius 2024 down 12.3% 825th Land surface temperature - Cities and FUAs — Daytime winter land 7.41 Degrees celsius 2024 up 2.9% 717th Land surface temperature - Cities and FUAs — Daytime yearly land 19.44 Degrees celsius 2024 down 11.0% 933rd Land surface temperature - Cities and FUAs — Nighttime summer land 13.38 Degrees celsius 2024 down 7.3% 1116th Land surface temperature - Cities and FUAs — Nighttime winter land 2.66 Degrees celsius 2024 up 58.6% 462nd Land surface temperature - Cities and FUAs — Nighttime yearly land 8.46 Degrees celsius 2024 down 0.6% 638th Air pollution - Cities and FUAs — Population exposure to nitrogen 33.22 Microgrammes per cubic metre 2025 — 645th Air pollution - Cities and FUAs — Population exposure to ozone 103.19 Microgrammes per cubic metre 2025 — 278th Air pollution - Cities and FUAs — Population exposure to PM10 34.44 Microgrammes per cubic metre 2025 — 834th Air pollution - Cities and FUAs — Population exposure to PM2.5 23.97 Microgrammes per cubic metre 2025 — 828th