An Australian study has found that many laser printers emit high levels of small particles that can be harmful to human health, with the highest-emitting machines rivaling the small-particle pollution of cigarette smoke. Some printers are better than others, and even newer models are included. The study published in the journal Environmental Science & Technology, found that particle emissions varied enormously depending on make, model, and age of the printer, as well as the type and age of the toner cartridge. Newer cartridges emit more particles, as does printing graphic-heavy files. They give a list of printer models tested listing high, mid and non-emitting printers. If you have health concerns or you work in a small enclosed space with a laser printer, you should be aware of this. Try an internet search for “lungs” + “laser printer” and see various articles on this issue.