From the summary: "Scientists at the Northern Research Station are studying the connection between urban greening, public health, and crime. One recent study found that firearm assault frequency decreased following improvements to abandoned buildings and vacant lots. Another study that focused on Philadelphia gunshot crime survivors found that the likelihood of being assaulted was lower when people were under tree cover as opposed to when they were out in the open. A third study determined that neighborhood improvements had a lower financial cost than the gun-related crime that the improvements helped to prevent. Since many U.S. cities have plans in place to increase citywide tree canopy levels and improve green stormwater infrastructure, this research may help city land managers to prioritize spending and work with nongovernment organizations to maximize environmental, economic and social benefits."
Northern Research Station: https://www.nrs.fs.fed.us/
Urban Field Station Review (Spring 2018), Issue 4