Carbon monoxide (CO) is a colorless, odorless gas that is poisonous and can kill you if you inhale too much.

Do you think you get enough sleep each night? The National Sleep Foundation says everyone should aim to get between seven and a half to nine hours of sleep each night.

Roughly 32 million workers in the U.S. (over 20%) are exposed to hazardous chemical products, OSHA says.

Dermal exposure (when the skin is directly in contact with hazardous agents) is a very serious threat to many workers. Exposure to such chemicals costs the U.S. over $111,000 annually, according to the American Burn Association. Those costs include hospital bills, disability claims and worker compensation.

You sit at your desk, stare at your computer, make phone calls, walk to the printer, check on fellow employees and so on. The last thing you're probably thinking about is the air that you breathe in. In many cases, indoor air quality (IAQ) can truly be the silent killer.

Many offices have poor IAQ. Proper ventilation is something of the utmost importance so why not look into it at your place of work?