Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is poisonous to humans and animals. It is produced by the incomplete combustion of fuels, such as gasoline, propane, and natural gas. CO is also a by-product of tobacco smoke.

When CO is inhaled, it binds to hemoglobin in the blood, forming carboxyhemoglobin (COHb). COHb cannot carry oxygen to the body's tissues, which can lead to tissue hypoxia and death.

The symptoms of CO poisoning can vary depending on the severity of the exposure. Mild CO poisoning can cause headaches, dizziness, nausea, and vomiting. Severe CO poisoning can cause confusion, unconsciousness, and death.

CO poisoning is a serious medical emergency. If you think someone has been exposed to CO, call 911 immediately.

Here are some tips to prevent CO poisoning:

* Never use a generator, grill, or other gasoline-powered appliance inside your home.

* Make sure your home has a working CO detector.

* Inspect your home for any potential sources of CO leaks, such as cracks in the chimney or faulty appliances.

* If you think you may have been exposed to CO, get fresh air immediately and call 911.