NYC's Tree Planting Plan Faces Air Quality Challenges

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

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.