Carbon monoxide poisoning occurs when a person inhales carbon monoxide (CO), a colorless, odorless gas produced by burning fossil fuels. Common sources include car exhaust, gas appliances, and wood-burning stoves. When CO enters the bloodstream, it prevents oxygen from reaching vital organs, leading to serious health issues. Symptoms of carbon monoxide poisoning can include headache, dizziness, weakness, nausea, and confusion. In severe cases, it can result in loss of consciousness or even death. It is crucial to have proper ventilation and functioning carbon monoxide detectors in homes to prevent exposure to this dangerous gas.