Your laser printer is killing you

If you worked in an office only a few hundred metres from a motorway, you would probably be tempted to seal the windows to keep out the nasty noxious fumes, fire up the aircon, and get on with your daily business in your clean fresh indoor environment. But what would you do if you found that the laser printer humming away at the desk next to yours was in fact pouring out more evil air than the traffic outside? Heave open the nearest window and throw the laser printer out of it? Yes, me too.