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NYC's Tree Planting Plan Faces Air Quality Challenges

New research reveals that increasing tree cover could raise ozone levels, complicating urban greening efforts.

Image
image: ©Ingus Kruklitis | iStock
Central Park trees in autumn. (Photo by Sean Pavone on Shutterstock)

Overview

  • Study shows oak and sweetgum trees emit isoprene, which reacts with pollutants to form ozone.
  • Potential increase in isoprene emissions could significantly raise ozone levels on hot days.
  • Strategic planting of low isoprene-emitting trees could mitigate the issue.
  • Reducing nitrogen oxide emissions is crucial to improving air quality.
  • Urban planning must balance tree benefits with air quality impacts.