Carbon monoxide poisoning occurs when a person inhales too much carbon monoxide, a colorless and odorless gas produced by burning fuels like gas, wood, or coal. This gas can build up in enclosed spaces, such as homes or vehicles, leading to dangerous levels that can harm health. Symptoms of carbon monoxide poisoning include headache, dizziness, weakness, nausea, and confusion. If exposure continues, it can lead to unconsciousness or even death. It is crucial to have working carbon monoxide detectors in homes and to ensure proper ventilation when using fuel-burning appliances to prevent this type of poisoning.