Environment in Polk 13 indicators covering environment for Polk. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -2.5 Percentage change 2025 down 140.3% 630th Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.08 Tonnes of CO2-equivalent 2024 unchanged 371st Total and environment-related patents - FUAs — Patent applications 30.7 Patents 2022 down 50.7% 291st Land surface temperature - Cities and FUAs — Daytime summer land 29.85 Degrees celsius 2024 down 3.1% 713th Land surface temperature - Cities and FUAs — Daytime winter land 7.61 Degrees celsius 2024 up 185.7% 706th Land surface temperature - Cities and FUAs — Daytime yearly land 21.94 Degrees celsius 2024 up 6.9% 640th Land surface temperature - Cities and FUAs — Nighttime summer land 17.98 Degrees celsius 2024 down 1.7% 510th Land surface temperature - Cities and FUAs — Nighttime winter land -6.17 Degrees celsius 2024 up 31.9% 1283rd Land surface temperature - Cities and FUAs — Nighttime yearly land 6.39 Degrees celsius 2024 up 56.3% 1064th Air pollution - Cities and FUAs — Population exposure to nitrogen 10.75 Microgrammes per cubic metre 2025 — 1021st Air pollution - Cities and FUAs — Population exposure to ozone 53.13 Microgrammes per cubic metre 2025 — 1116th Air pollution - Cities and FUAs — Population exposure to PM10 28.8 Microgrammes per cubic metre 2025 — 994th Air pollution - Cities and FUAs — Population exposure to PM2.5 9.02 Microgrammes per cubic metre 2025 — 1153rd