Carbon monoxide (CO) is a colorless, odorless gas that can cause illness and death. CO is found in combustion emissions, such as those produced by cars and trucks, small gasoline engines, stoves, lanterns, burning charcoal and wood, and gas ranges and heating systems. This document is part of a series from the Insurance Services Office (ISO) and covers industry hazards and topics, providing businesses with actionable strategies to safeguard their employees.