With concerns about scarcity and environmental impacts of fossil fuels, markets and technologies are emerging to use tree waste as an energy source. Although timber harvesting residues currently account for the majority of energy production from tree waste, efforts are underway to also utilize urban tree waste. Energy production typically entails combustion of wood waste in a steam boiler that generates electricity. These power plants are often co-fired with coal, but plants dedicated solely to wood combustion are currently coming …