Planting Some Tree Species May Worsen, Not Improve, NYC Air, Says New Study
Briefly

Oaks and sweetgums planted in NYC emit isoprenes that react with nitrogen oxides to create ground-level ozone, leading to respiratory ailments like chronic bronchitis and asthma.
Maintaining current tree species patterns in new plantings could result in a 140% increase in isoprene production and up to 30% more summer ozone in Manhattan in the coming decades.
Read at State of the Planet
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