"Research has proven that infants and toddlers, who spend more time on the floor and experience the world with their hands and mouths, are not merely in closer contact with many indoor pollutants2 but also more sensitive to them. Yet environmental health standards in child care settings nationwide—which can include not just centers but also private homes, workplaces, universities, and places of worship—still lag behind those of schools, where children are older, larger, and somewhat less susceptible to environmental exposures. Unlike with more uniformly regulated schools, child care licensing, permitting, and oversight occur on a variety of levels, resulting in a fractured regulatory landscape."