United States
Country in Americas
In brief
Air pollution PM2.5, µg/m³: 7 (2023). World rank 25 of 200 (1 = best); in Americas, 6 of 39. CO₂ emissions, tonnes per person: 13.6 (2024). World rank 189 of 203 (1 = best); in Americas, 41 of 43. All greenhouse gases, tonnes CO₂e per person: 17.4 (2024). World rank 189 of 203 (1 = best); in Americas, 41 of 43. From 2015 to 2025: protected areas 20.1% → 15.8%.