5 Countries That Produce the Most Pollution in the World

4. China

Annual Average PM2.5 Concentration (2023): 32.5 μg/m³

Total Waste Generation (2018): 9.2 Giga tonnes per year

Total GHG Emissions (2020): 12.29 Giga tonnes of CO2e

EPI Water and Sanitation Score (2020): 59.4

Insider Monkey Score: 16.8

China ranks 4th on our list. The country is the largest emitter of GHG emissions and also the biggest producer of waste. As of 2023, it had a PM2.5 concentration of 32.5 μg/m³.