In this project, Rema Hanna and co-PI Paulina Oliva continue research from their 2015 study on the impact of pollution on health and labor market decisions using data from Mexico. In that study, they exploited exogenous variation in pollution due to the closure of a large refinery in Mexico City to understand how pollution impacts labor supply. The closure led to an 8 percent decline in pollution in the surrounding neighborhoods. They found that a one percent increase in sulfur dioxide results in a 0.61 percent decrease in the hours worked. The effects do not appear to be driven by labor demand shocks nor differential migration as a result of the closure in the areas located near the refinery.