The researchers found that at sites worldwide, the higher the pollution rate, the greater the rate of low birth weight.
Low birth weight (a weight below 2500 grams or 5.5 pounds) is associated with serious health consequences, including increased risk of postnatal morbidity and mortality and chronic health problems in later life,...
"What's significant is that these are air pollution levels to which practically everyone in the world is commonly exposed," said Woodruff. "These microscopic particles, which are smaller than the width of a human hair, are in the air that we all breathe."
Woodruff noted that nations with tighter regulations on particulate air pollution have lower levels of these air pollutants.