Air pollution’s impact on life expectancy in Nigeria is greater than that of HIV/AIDS and almost on par with malaria and unsafe water and sanitation, shortening the average Nigerian’s life expectancy by 1.8 years, relative to what it would be if the World Health Organization (WHO) guideline of 5 μg/m3 was met.1 Some areas of Nigeria fare much worse than average, with air pollution shortening lives by almost 4 years on average in parts of Taraba state in Northeastern Nigeria.