iTree:
A combination of science and free tools that quantifies the benefits and values of trees.

i-Tree Eco version 6 is a flexible software application designed to use data collected in the field from single trees, complete inventories, or randomly located plots throughout a study area along with local hourly air pollution and meteorological data to quantify forest structure, environmental effects, and value to communities.

i-Tree Eco
is currently designed to provide estimates of:

• Urban forest structure - Species composition, number of trees, tree density, tree health, etc.
• Pollution reduction - Hourly amount of pollution removed by the urban forest, and associated percent air quality improvement throughout a year. Pollution removal is calculated for ozone, sulfur dioxide, nitrogen dioxide, carbon monoxide and particulate matter 2.5 (<2.5 microns).
• Public health impacts – Health incidence reduction and economic benefit based on the effect of trees on air quality improvement for the United States only.
• Carbon - Total carbon stored and net carbon annually sequestered by the urban forest.
• Energy Effects - Effects of trees on building energy use and consequent effects on carbon dioxide emissions from power plants.
• Avoided runoff - Yearly avoided runoff attributed to trees summarized by tree species or strata.
• Forecasting - Models tree and forest growth over time; considers factors like mortality rates, tree planting inputs, pest and disease impacts and storm effects. Some ecosystem services including carbon and pollution benefits are also forecasted.
• Bio-emissions - Hourly urban forest volatile organic compound emissions and the relative impact of tree species on net ozone and carbon monoxide formation throughout the year.
• Values - Compensatory value of the forest, as well as the estimated economic value of ecosystem services.
• Potential pest impacts - based on host susceptibility, pest/disease range and tree structural value.

Find out more about iTree Eco here