The cost of pollution in human lives is often abstract due to the long-term nature of such deaths. The cost, however, is quite concrete: A new report estimates that 4.1 million people died as a result of ambient air pollution in 2016. And that’s a conservative estimate.
Globally, only five causes of death took a higher toll. (High blood pressure and smoking were the leading causes.)
That sobering report was issued this month by teams of researchers at the Health Effects Institute and the Institute for Health Metrics and Evaluation. Their report, State of Global Air 2018, sought to analyze worldwide air pollution exposures and health impacts; data for 2016 is used because that is the most recent data available. The report states:
“Worldwide exposure to PM2.5 contributed to 4.1 million deaths from heart disease and stroke, lung cancer, chronic lung disease, and respiratory infections in 2016. PM2.5 was responsible for a substantially larger number of attributable deaths than other more well-known risk factors (such as alcohol use, physical inactivity, or high sodium intake) and for an equivalent number of attributable deaths as high cholesterol and high body mass index. Ozone, another important component of outdoor air pollution, whose levels are on the rise around the world, contributed to 234,000 [additional] deaths from chronic lung disease.”
“PM2.5” refers to particulate matter less than or equal to…