Tonga

Country in Oceania

In brief

Air pollution PM2.5, µg/m³: 4.7 (2023). World rank 11 of 200 (1 = best); in Oceania, 8 of 17. Forest cover: 12.1% (2024). World rank 155 of 213; in Oceania, 17 of 19. Protected areas: 0.1% (2025). World rank 199 of 213 (1 = best); in Oceania, 14 of 19. From 2015 to 2025: protected areas 1.5% → 0.1%.

Air and emissions

Air pollution PM2.5, µg/m³: 4.7 2023
CO₂ emissions, tonnes per person: 1.6 2024
All greenhouse gases, tonnes CO₂e per person: 2.8 2024

Nature and water

Forest cover: 12.1% 2024
Protected areas: 0.1% 2025
Renewable fresh water, m³ per person: No data
Water stress, share of fresh water withdrawn: No data