In Tennessee, where the governor allows families to ignore school mask mandates, some parents are making excruciating calculations each morning about whether to send their children to school.

Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, and business professionals.

The study shows that people with lower income and education have worse lung health, even though air quality has improved in recent decades.

Lead screenings for children plummeted last spring, and stay-at-home orders may have increased household exposure to the toxic metal.

This is a story about maps and death.