Trees may not be the first thing that comes to mind when you picture big cities, but they’re an essential part of many urban landscapes. By maintaining a healthy tree population, a city can clean the air , provide shade to buildings, and improve the quality of life of its residents. To quantify the impact trees have, officials first need to keep track of how many grow within city limits—a task that’s harder than it sounds. Even with thousands of volunteers working on the ground, tallying all the trees in a city like New York can take years, according […]
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