Pellet fuel is from the combustion of biomass materials into compressed fuel. Most commonly used types of wood pellets are to form wood fuel. Wood pellets are usually made from Acacia tree, Eucalyptus tree and other wood products of compacted sawdust or other waste. Other biomass woods include palm kernel shell, coconut shell, and Acacia, Eucalyptus after logging of the remaining trees and tree branches. There is sweet sorghum, sugar cane and Silver Acacia granulates to form particles. Particles are made with several types and grades of fuel for power plants, for household use, and environmental protection use. Wood Pellet is very compact and can be manufactured with low water content (less than 10%), enabling them to power plants with very high combustion efficiency.