<http://schema.org/about>
"Everyone knows that tobacco or alcohol use during pregnancy can have a negative impact on a developing child's health -- but it turns out there's another dangerous environmental factor which might not be so easy to avoid."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/health/breathing-exhaust-fumes-may-make-your-unborn-child-do-poorly-school.html>