Care for the unborn is critical and widely agreed upon as being important to the child and perhaps to our very society. While there is a great deal the Mother can do regarding proper nutrition, she can do little to avoid breathing in particulate matter.
Studies show that pregnant women exposed to higher levels of pm2.5 that are still within the acceptable standards set by EPA are more likely to to have intrauterine inflammation than those exposed to lower levels. (“Even a Little Air Pollution May Have Long-Term Health Effects On Developing Fetus”, Johns Hopkins Bloomberg School of Public Health.)
Intrauterine inflammation is one cause of premature birth. The particulate matter in question comes from auto, truck, utility, and industrial emissions, all regulated by the EPA. It seems to me