• Half of US population exposed to adverse lead levels in early childhood https://www.pnas.org/doi/full/10.1073/pnas.2118631119 97 comments 19/3/2022

• Half of US population exposed to adverse lead levels in early childhood https://www.pnas.org/doi/epdf/10.1073/pnas.2118631119 144 comments 3/12/2022 environment