Everyday ChemicalsWhat is the likelihood that common chemicals such as bisphenol A, which is found in plastic water bottles, are harming us? Should shoppers be concerned about pesticide residues on fruits and vegetables in the supermarket produce aisle? Are we risking adverse health effects when we use insect repellent that contains DEET or slather on sunscreen? Modern life requires us to navigate an endless sea of chemicals. How do we know whether we need to worry