Air pollution may be harmful to babies even before they are born, a new study has found.
Researchers in London calculated mothers’ exposure to air pollution and traffic noise in various parts of the city from 2006 to 2010. Then they amassed data on birth weights of 540,365 babies born during those years to women who lived in those areas.
The average pollution exposure was 14 micrograms per cubic meter of PM 2.5, the tiny particles that easily enter the smallest airways in the lungs. The researchers found that for each 5 microgram per cubic meter increase in PM 2.5, the risk of low birth weight increased by 15 percent. Low birth weight is a predictor of an increased risk for diabetes, heart disease and hypertension in later life.
The study, in BMJ,…