Planting trees can save lives, study shows

A 30-year tree planting campaign in Portland, Oregon, allowed researchers to show that the number of trees planted in the street is associated with reductions in mortality, and that the association grows stronger as the trees age and grow.A 30-year tree planting campaign in Portland, Oregon, allowed researchers to show that the number of trees planted in the street is associated with reductions in mortality, and that the association grows stronger as the trees age and grow.

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