It's well known that air pollution can cause of all kinds of nasty health problems - headaches, nausea, allergic reactions, chronic respiratory disease, lung cancer and heart disease counted among them. But according to new research, it can also make unborn children stupid.
A study by the Columbia Center for Children's Environmental Health (CCCEH) carried out in Krakow, Poland has found that prenatal exposure to pollutants can adversely affect children's cognitive development by age 5.
Researchers report that children exposed to high levels of polycyclic aromatic hydrocarbons (PAHs) in Krakow had a significant reduction in scores on a standardized test of reasoning ability and intelligence at age 5. The study findings appear in Environmental Health Perspectives.
PAHs are released into the air from the burning of fossil fuels for transportation, heating, energy production, and from other combustion sources.
"The effect on intelligence was comparable to that seen in NYC children exposed prenatally to the same air pollutants," noted Frederica Perera, professor of Environmental Health Sciences and director of the CCCEH at the Mailman School of Public Health, and senior author. "This finding is of concern because IQ is an important predictor of future academic performance, and PAHs are widespread in urban environments and throughout the world."
The study included a cohort of 214 children who were born to healthy, non-smoking Caucasian women in Krakow, Poland between 2001 and 2006. During pregnancy, the mothers completed a questionnaire, wore small backpack personal air monitors to estimate their babies' PAH exposure, and provided a blood sample and/or a cord blood sample at the time of delivery.
The children were followed through the age of 5 when they were tested using the Raven Coloured Progressive Matrices (RCPM) Test of reasoning ability and intelligence.
Researchers accounted for other factors such as second-hand smoke exposure, lead and mother's education. Study participants exposed to air pollution levels below the median (17.96 nanograms per cubic meter) were designated as having "low exposure," while those exposed to pollution levels above the median were identified as "high exposure."
"Air pollution knows no boundaries," said Linda Birnbaum, director of the National Institute of Environmental Health Sciences. "Researchers around the globe are finding that air pollution is harmful to children's development."
Citation: Edwards et al., 'Prenatal Exposure to Airborne Polycyclic Aromatic Hydrocarbons and Children’s Intelligence at Age 5 in a Prospective Cohort Study in Poland', Environmental Health Prospectives, ' April 2010; doi:10.1289/ehp.0901070
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Are Think Tanks More Credible To Government Employees? Not Really
- The Daily Physics Problem - 1
- Hugh Hefner's Wife Was Not Poisoned By Breast Implants
- Why Has Climate Change Taken So Long?
- Odds of Intelligent life on the TRAPPIST-1 planets : NOT Great.
- Book News And A Clip
- Neural Networks: Why Human Brains Are More Susceptible To Mental Illness Than Smaller Ones
- "High -x means that we are in the tail of the PDF function. Which means low statistics since it..."
- "I cannot see the gluon PDF uncertainty which is the largest in high-x if I remember correctly?..."
- "nuclear power industry is also subsidized by the federal gov't...."
- "Please be patient. Despite what the Nibiru fearmongers say, I'm not paid to do this (if only :)..."
- "Dear Tilly,Great, glad to have helped.With the contrails, well one factor surely is that we have..."
- Parasite proteins prompt immune system to fight off ovarian tumors in mice
- Behavioral activation as effective as CBT for depression, at lower cost
- The Lancet: Simpler, cheaper psychological treatment as effective as cognitive behavioural therapy for treating depression
- Ultrasensitive sensor using N-doped graphene
- Brain activity and response to food cues differ in severely obese women, UTSW study shows