Planting trees can save lives 

A natural experiment took place in the city of Portland: between 1990 and 2019. Friends of Trees planted 49,246 street trees (and kept records of where the trees were planted, and when). A research team looked at the number of trees planted in a given area (specifically, a census track, where approximately 4,000 people live) in the preceding 5, 10 or 15 years. They associated this information with mortality due to cardiovascular, respiratory or non-accidental causes in that same area, using data from the Oregon Health Authority.

Take a look at the research in https://www.sciencedaily.com/releases/2022/11/221117102819.htm?fbclid=IwAR0kuo010SnaYGZK4WOeeJG_xq_1Vx0I80iNdqYQ2CYx25Kk0leEvNxV0oc