New York City launches Trees Count 2025, the fourth tree inventory, inviting volunteers to identify, measure, and record park trees across five boroughs. Participants receive a 20-minute training session in tree identification and data entry, and use a dedicated app for counting. Trees enhance the city's livability by improving air quality and saving costs. Previous counts informed tree planting strategies and are accessible through a detailed online tree database. This year's street tree count involves advanced technology, yet still relies on human volunteers for accurate park tree data collection.
Volunteers are tasked with identifying, measuring and recording the species and condition of park trees across all five boroughs. No experience? No problem.
Why count trees? Because they're working overtime to keep the city livable—cleaning the air, cooling streets, capturing stormwater and quietly saving NYC over $150 million annually.
Previous counts helped shape everything from street tree planting strategies to NYC's acclaimed Tree Map, a living, clickable database of over 800,000 street and park trees.
While this year's street tree tally will be handled via high-tech LiDAR scanning and machine learning, the city still needs human hands - and eyes - to inventory the trees.
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