Most plastic containers release only tiny, harmless amounts of chemicals into the food or liquids they hold. But those amounts increase when the plastic containers are exposed to hot temperatures, and that raises concerns about possible negative health impacts that could result over time, warns Fulton Schools Professor Rolf Halden, director of ASU’s Center for Environmental Health Engineering. All the more reason to be aware of — and take steps to prevent — the potential problems of living in a world where we are surrounded by plastics, Halden says.