Revealed: a toxic metal is in a US city's air - and may be harming children's brains

Lead is still used at some racetracks around the US, including in Portland, Oregon - and lead emissions can impair the cognitive development of children living nearby When a neighbor mentioned to Kristy Lanciotti, a mother of two and pediatric nurse who works in environmental health, that toxic leaded gasoline was being used at a racetrack just down the road from her house in Portland, Oregon, she was taken aback. She was well aware of Portland International Raceway - most summer weekends were p...