The policy to remove a significant number of public trash cans from SF streets has important public cleanliness concerns and was primarily implemented to decreased illegal dumping of trash on streets. Public sanitation and pest control have important implications for public health. I imagine the most directly impacted population would be the street homeless and immediate neighbors to removed trash containers. I assume those least impacted would be those who are not street homeless, live in less dense neighborhoods, or live in neighborhoods where the amount of trash containers was not decreased. I think inferring about the impact of this policy on public health is going to be difficult as it is a diffuse public action. Evaluating the effect of rodent and insect populations in the impacted area is one effective measure. There may be existing data available on these pest problems to evaluate (sanitation records, restaurant inspection data, etc). One could compare these estimates before/after implementation of this policy and evaluate if there was an impact.