https://youtu.be/wj__EkipuLQ
Okay, here is a question to ponder. Would you prefer to live in a neighborhood that has a lot of rats or crime? There now is a link between rat infestation and the increased risk of depressive symptoms due to concerns the risk of rats spreading disease. Nobody likes living around rats, they are considered to be an under-appreciated stressor. Rats are thought to be a sign of a bad neighborhood. By reducing the number of rats in your neighborhood you can improve your well-being. But what may be truly surprising is that rats more than crime may make people depressed. Rat infestations may harm the mental health of people who live in poor neighborhoods to the same extent as abandoned homes, violence and drug dealing. The good news is this situation is modifiable. If you can do something to reduce the number of rats in your neighborhood, you can improve your well-being.
http://www.delta-optimist.com/opinion/blog-rats-or-crime-in-your-neighbourhood-1.2201311