Urban Forests and Heat Waves

Written by Melanie Lenart

Recent research suggests the extra heating measured in cities operates, at least to some degree, at the scale of neighborhoods. In hot desert cities, such as Phoenix, Arizona, an urban forest can help keep neighborhood temperatures …

Urban Forests and Pollution

Written by Melanie Lenart, University of Arizona
Urban trees play multiple roles when it comes to local air pollution. While trees in general help reduce air pollution, including absorbing the greenhouse gas carbon dioxide, some species contribute to local smog …

Trees and Local Temperature

Trees shading parking lot.
Figure 1. Trees shade an urban parking lot.

Written by Melanie Lenart

Urban forests can help keep cities within a healthy temperature range, although the exact temperature reduction from urban forests is difficult to measure. The extent of the effect …