Despite its relatively slow speed (compared to higher-end 25ppm/cpm+ units), the imageCLASS D320 does stand proud in regards to conservation. For one, it utilizes the Canon Single Cartridge System, which combines the toner and drum into a single easy-to-replace unit, thereby reducing expenses. Plus it abides by Canon's Green Generation environmental initiative, which utilizes a wide-range of functions and technologies (toner saving, toner cartridge recycling, etc) to reduce waste and conserve energy.