5 Most Polluted Countries in the World

2. Chad

Air quality index score: 161

Chad is the most polluted country in Africa and air pollution is considered to be the third biggest risk factor in the country, after sanitation and malnutrition. In 2017, more than 14,000 deaths were caused due to air pollution while the decrease in life expectancy is close to three years. The entire population of the country lives in areas with air pollution above the recommended guidelines by the World Health Organization.