I have an Autumn Flame red maple that I planted in my backyard probably about 15 years ago. I forget how much I paid for it, but according to calculations, this tree alone has saved about $46.08 in total benefits just this year. Specifically, over the course of a year my tree: sequesters about 36.39 lbs of CO2; intercepts 1,501.7 gallons of rainfall to avoid 229.3 gallons of runoff; removes 82.63 ounces of ozone; saves 46.05 kWh in electricity; and avoids 149.34 lbs of carbon dioxide emissions. Since its planting, my maple has stored about $849.61 worth of CO2, and over its lifetime will save 80,537.23 lbs of CO2. Clearly, my tree is much busier than I imagined. I planted it for shade and beauty, but it’s nice to know of all the other important work it is doing in combatting climate change—especially in honor of Arbor Day today. How did I get the numbers on my tree? I ran across a site, linked from the NY state Department of Environmental Conservation page on Arbor Day, called mytree.itreetools.org, a simple web application that will calculate the benefits of trees in your neighborhood. You only have to know a few key facts about your tree: the species, condition, diameter, and sun exposure. Developed in 2006, i-Tree is actually a free software suite from the USDA Forest Service that can be used to strengthen advocacy efforts by quantifying the environmental benefits of trees. According to the i-Tree site, “…thousands of communities, non-profits, ...