Extended Data Fig. 2: PM2.5 networks and weights.
From: Disparate air pollution reductions during California’s COVID-19 economic shutdown
A Location of public (California Air Resources Board (CARB) and United States Environmental Protection Agency (EPA)) PM2.5 monitors, as well as privately-owned PurpleAir PM2.5 monitors used in this study. B Weights used in the model to better represent the Californian population. Each dot represents one census block group. C Distribution of weights generated by the raking process, across sensor types.
