The United States maintains stable air quality amid climate pressures, with average temperatures rising 1.2°C since 1970 per NOAA data. Extreme weather frequency has increased 20-30% for hurricanes and heatwaves over 20 years (NOAA, 2023). Strong policies protect 12% of land as national parks, while renewable energy adoption accelerates toward net-zero goals. Water quality is generally good but challenged by agricultural runoff. Sustainability efforts emphasize emissions cuts, water stewardship, and circular economy transitions.