Carbon Monoxide is a colorless, odorless and tasteless gas that often comes from improperly installed or maintained gas burning devices. Many buildings use gas for heating and cooking. However, CO can also build up from the burning of wood, oil or gasoline. CO kills by inhibiting the blood's ability to carry oxygen. Symptoms of CO poisoning include headache, nausea, drowsiness, and confusion. However, many people who die of carbon monoxide poisoning, die in their sleep, without the opportunity to recognize the symptoms and escape. This is why having a CO detector is so important, especially when you travel, and have less knowledge of and control over safety measures taken in your lodging!