The fact is, since humanity start to use fossil fuels the mortality decrease more and more. Thanks to fossil fuels there are ways to develop more and more technology to create cures for all kind of deseases, and the ability to send those cures abroad in days, even hours if necessary. So, when you read an "Study" that correlates the death of childrens of color with the pollution, ask yourself this: Why in Santiago of Chile, one of the polluted cities in the world, the infant mortality is so small compared to USA? USA is a rich country, Chile is a middle class country with per capita income about US$23.000. The problem isn't the pollution, the problem is a health system that fail to th public, and a diet that is killing you people.