Researchers plant trees in an experiment to lower rates of heart disease (2021)
discovermagazine.com
discovermagazine.com
California:
Cupertino https://www.cupertino.org/our-city/departments/public-works/...
L.A. https://www.cityplants.org/our-programs/
Gardena https://cityofgardena.org/planting-trees/
North Vancouver, BC https://www.dnv.org/community-environment/urban-tree-canopy-...
Massachusetts: https://www.maurbancanopy.org/tell-me-more/
Two people, a photographer and his wife, managed to plant 2 million trees in 318 million acres (129 million hectares).
A couple of organizations work toward the goal of planting more trees across the world:
https://www.nature.org/en-us/get-involved/how-to-help/plant-...
https://www.arborday.org/about/
Here are more lists of charities that plant trees:
https://impactful.ninja/best-charities-for-planting-trees/
https://donorbox.org/nonprofit-blog/best-charities-planting-...
It certainly makes towns prettier.
The article already hypothesises a few confounders (leaf hair trapping particles, plants sequestering pollutants in other ways) but psychological reasons could even turn out to be stronger, given how little of exercise is sufficient to offset cadio-vascular risks - more plants around make it more likely for people to go outside for walking or running.
cf https://www.treehugger.com/how-do-trees-reduce-noise-polluti...
The answer is 'no'
https://en.m.wikipedia.org/wiki/Betteridge%27s_law_of_headli...