Environment in Guernsey 37 indicators covering environment for Guernsey. IndicatorLatest Year10-yr change Rank Standard Deviation, annual growth rate 0 % change on previous year 2025 — 10th Temperature change 1.96 °C 2025 up 77.8% 57th Standard Deviation 0.483 °C 2025 unchanged 62nd Forest area 470 hectares 2025 up 11.9% 222nd Share of global forest area 0.0% 2025 up 13.0% 222nd Annual change in forest area as a share of forest area 0.0% 2025 down 100.0% 85th Annual change in forest area 0 hectares 2025 down 100.0% 85th Annual change in forest area vs. GDP per capita 0.0% 2025 down 100.0% 84th Change in domestic forest area vs. deforestation embedded in imported goods 0 hectares 2025 down 100.0% 85th Exposure to air pollution from human sources 6.23 micrograms per cubic meter 2024 down 18.9% 172nd Exposure to outdoor air pollution 7.4 µg/m³ 2024 down 20.4% 190th River flooding exposure — Cropland share exposed to river flooding 0 Percentage of agricultural land area 2022 — 142nd 15.2.1 Forest area under an independently verified forest management 0 1000 ha 2024 — 80th Share of terrestrial Key Biodiversity Areas that are protected 11.0% 2025 up 1.2% 209th Average proportion of Marine Key Biodiversity Areas (KBAs) covered by 11.0% 2025 up 1.1% 164th Average proportion of Terrestrial Key Biodiversity Areas (KBAs) 11.0% 2025 up 1.1% 221st Protected area coverage of marine key biodiversity areas 11.0% 2025 up 1.2% 155th 15.1.1 Land area — Value 6.35 1000 ha 2025 unchanged 207th 15.1.1 Forest area — Value 0.47 1000 ha 2025 up 11.9% 207th 15.1.1 Forest area as a proportion of total land area — Value 7.4 % 2025 up 12.0% 174th Proportion of population using safely managed sanitation services, by 87.5% 2024 unchanged 45th Proportion of population using basic sanitation services, by location 100.0% 2024 unchanged 1st Lakes and rivers permanent water area 0.9716 2022 up 32.7% 214th Reservoir maximum water area 0 2022 — 153rd Reservoir minimum water area 0 2022 — 153rd Lakes and rivers seasonal water area 0.8456 2022 up 73.6% 221st Land cover and land cover change — Grassland 2.94 Square kilometres 2022 unchanged 161st Land cover and land cover change — Loss of cropland 5.11 Square kilometres 2022 up 2.2% 153rd Land cover and land cover change — Gain of artificial surfaces 5.66 Square kilometres 2022 up 2.0% 152nd Lakes and rivers seasonal water area change 50.2% 2022 up 472.6% 141st Lakes and rivers permanent water area change 42.6% 2022 up 471.2% 41st Forest area certified under an independently verified certification 0 2024 — 92nd Forest certified for sustainable use 0 thousands of hectares 2024 — 85th Exposure to outdoor air pollution in urban areas 8.3 micrograms per cubic meter 2023 down 24.1% 175th Forest area as a proportion of total land area 7.4% 2025 up 12.0% 203rd Forest area 0.47 2025 up 11.9% 239th Share of forest area within protected areas 0.0% 2017 — 190th