Study Will Examine Genes, Environment Several federal agencies have teamed up to launch one of the most ambitious biomedical projects in history -- a massive study to identify the biggest threats to children's health. The National Institute of Child Health and Human Development, the National Institute of Environmental Health Sciences, the Centers for Disease Control and Prevention, and the Environmental Protection Agency are working together to plan the project, the National Children's Study. The study would examine a vast array of factors that may affect physical, mental, emotional and developmental health by following more than 100,000 children across the country...