GAINESVILLE, Fla. – A big tree next to your house can do more than just save home-cooling costs, it will also cut carbon emissions, University of Florida researchers say.
Trees shade houses so that less energy is needed to cool them. But trees, especially older ones, also store and sequester carbon. Through photosynthesis, trees sequester ─ or capture ─ carbon dioxide from the atmosphere to create energy for growth. This carbon is then stored in the tree as long as the tree remains alive. Trees store carbon in their leaves, branches, trunks, stems and roots.
Carbon dioxide is released through electricity use, home heating, waste and transportation, among other activities, said UF wildlife ecology and conservation professor Mark Hostetler. Through photosynthesis, trees can offset the amount of carbon dioxide emitted by a house through carbon storage and sequestration.
With UF experts projecting the state to grow from 19 million now to 25 million in 2040, more land will be needed for housing, commercial and recreational uses. With a population increase comes more need for fossil fuels for heating, cooling and transportation and usually wildlife habitat losses, said Richard Vaughn, one of Hostetler’s former master’s students.
“While climate change mitigation takes place on many levels, I focused on the city level,” Vaughn said. “Cities are increasingly trying to offset carbon dioxide emissions, and new residential developments are a major source of such emissions. Our study offers a viable mitigation strategy that addresses many of these issues.”
With a goal of storing more carbon, Vaughn studied how to design conservation-friendly neighborhoods. Using tree data and a model, Vaughn examined how to design a subdivision for maximum tree carbon storage and sequestration.