BOSTON -- We already know about tiny, toxic particles in smog, cigarette smoke and car exhaust, but your laser printer?

Don't throw it out just yet, but a new study points out a possible health threat.

An Australian research team found some laser printers emit ultra-fine particles of toner into the air.

If you breathe that in, it could make you sick.

A lot more research needs to be done, but as a precaution, you may not want to sit near a laser printer.

You can find out more in the journal, Environmental Science and Technology.