Some Pennsylvania medical researchers have been awarded a 50-million-dollar grant to study how environmental factors affect mothers and their fetuses, babies, and toddlers. Researchers at the University of Pennsylvania and Children’s Hospital of Philadelphia say they will need to enroll 25-hundred pregnant women and their partners over a seven-year period. They will track neighborhood factors in poor areas such as pollution, violence and temperatures, as well as walkability and green space. The work is part the National Institutes of Health’s larger study of some 64-thousand children.