Oak trees are crucial for combating climate change by shading and absorbing carbon; however, their emissions can contribute to ground-level ozone pollution when combined with fossil fuel emissions.
The recent study indicated that if only oaks were planted in NYC, ground-level ozone in Manhattan could increase by over 30%. In contrast, a mixed canopy could lead to a 10% increase.
While trees provide significant benefits, the impact of isoprene emissions in conjunction with nitrogen oxides from fossil fuels could negate some of the positive effects they offer by increasing pollution.
More than 400 New Yorkers die annually from ground-level ozone pollution, and significant hospital visits are reported due to ozone-related asthma conditions linking urban tree management and air quality.
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