Environment in Developing regions 15 indicators covering environment for Developing regions. IndicatorLatest Year10-yr change Rank Average proportion of Freshwater Key Biodiversity Areas (KBAs) 33.1% 2025 up 11.8% 12th Average proportion of Mountain Key Biodiversity Areas (KBAs) covered 33.8% 2025 up 10.2% 15th Average proportion of Terrestrial Key Biodiversity Areas (KBAs) 33.5% 2025 up 11.4% 16th Average proportion of Marine Key Biodiversity Areas (KBAs) covered by 36.0% 2025 up 16.6% 11th Total official development assistance (gross disbursement) for water 9,640 million constant US$ 2024 up 6.3% 1st Total official development assistance for biodiversity, by recipient 13,672 million constant US$ 2024 up 87.5% 1st Lakes and rivers permanent water area 869,284 kmsq 2022 up 3.2% 6th Lakes and rivers seasonal water area 566,689 kmsq 2022 up 27.3% 2nd Reservoir minimum water area 178,897 kmsq 2022 up 2.2% 4th Reservoir maximum water area 217,541 kmsq 2022 up 3.8% 4th Reservoir minimum water area change 10.3% 2022 up 29.3% 11th Lakes and rivers seasonal water area change 34.5% 2022 up 512.9% 28th Lakes and rivers permanent water area change 5.5% 2022 up 149.8% 21st Lake water quality turbidity 17.5% 2021 — 14th Lake water quality trophic state 2.1% 2021 — 16th