FIGURE 2—

Conceptual graph of the types of actions to recommend in situations with high versus low knowledge about exposure–health effect relationships and exposure-reduction methods.

Note. PBDEs = polybrominated diphenyl ethers, PCBs = polychlorinated biphenyls. High certainty (i.e., high knowledge of exposure-effect relationships combined with high knowledge of exposure reduction methods) supports recommendations for public health policies and individual behavior change. Low certainty (i.e., low knowledge of exposure-effect relationships combined with low knowledge of exposure reduction methods) supports recommendations for further research and consideration of precautionary action.