American Forests is a world leader in planting trees for environmental restoration, a pioneer in the science and practice of urban forestry, and a primary communicator of the benefits of trees and forests. In addition to information about reforestation projects, this website contains several features that are useful to educators and professionals. A kid's section contains learning materials and classroom activites, downloadable in PDF format. A personal carbon dioxide calculator allows one to determine one's own impact on global warming. For professionals or planners, there is a free trial download of CityGreen 4.0. This GIS application allows modeling of benefits from tree planting, such as reduction in stormwater runoff, energy savings, air quality improvements, and carbon storage.