5 Least Polluted Countries in the World

4. New Zealand

Annual average PM2.5 concentration (μg/m³): 4.8

New Zealand is a developed island nation in the Pacific Ocean. It has one of the highest GDP per capita in the world of $47,278. The largest portion of New Zealand’s electricity is generated from clean sources such as natural gas and renewables. Its location provides New Zealand with a geographical advantage with geothermal power generation playing a major role in power generation. All in all, more than two thirds of New Zealand’s electricity comes from renewable sources.