Data for this research was obtained from the International Energy Agency and World Health Organization. Each country’s performance was ranked on five factors:

Energy consumption, per capita
Carbon dioxide emissions from fuel combustion, per capita
Air pollution
Deaths attributable to air pollution, per 100,00 capita
Renewable energy production

The ranks for each country were then averaged to give an overall impression of a country’s toxicity. …..

Saudi Arabia is the most toxic country in the world, having the highest recorded air pollution, surpassing India and even China.

Neighbouring oil-rich countries including Kuwait, Qatar, Bahrain and the United Arab Emirates (UAE) dominate the top 10 most toxic countries in the world, and have some of the lowest renewable energy production despite having an ideal climate – low rainfall and prolonged daylight hours – for solar energy.

The research also shows that countries in the Middle East have some of the highest number of deaths attributable to air pollution; Turkmenistan witnesses 108 deaths per 100,000 every year.