Carbon monoxide hazards are not to be taken lightly:

Known as the “silent killer,” carbon monoxide (CO) is a colorless, tasteless, odorless gas that comes from the incomplete combustion of fuels. Anything burned in or around your home – whether it’s gasoline, wood, coal, propane, natural gas or oil – can produce carbon monoxide under the right conditions. Without adequate ventilation, gas can build up to deadly levels. It doesn’t take much fuel to be dangerous: even a gadget like a chain saw can release enough carbon dioxide to make you sick. Therefore, in order to people’s health, related fields of industry invented CO gas detector.

Carbon monoxide enters the red blood cells and quickly replaces the oxygen the body needs. Your blood will then carry CO to your organs. If you inhale small amounts of CO over a long period of time, this exposure may not be fatal but can cause permanent damage to the brain, lungs and heart. Moderate CO exposure can cause burning eyes, nausea, vomiting, dizziness, severe headache, difficulty breathing, and confusion. These symptoms can easily be mistaken for other common illnesses, such as food poisoning or the flu. If carbon monoxide starts to fill homes while people are sleeping, exposure can be fatal before anyone realizes there is a problem. Infants, the elderly and people with respiratory and circulatory conditions are at increased risk of fatal carbon monoxide poisoning.