Carbon monoxide (CO) is a colorless, odorless, poisonous gas that forms from incomplete combustion of fuels, such as natural or liquefied petroleum gas, oil, wood or coal.
smoke detectors
A smoke alarm, also known as a smoke detector, is a device that detects smoke and issues an audible sound and/or a visual signal to alert residents to a potential fire. According to the Consumer Product Safety Commission, almost two-thirds of reported deaths caused by home fires from 2003 to 2006 resulted from fires in homes that lacked working smoke alarms.