Which factor exacerbates the hazards of LPG and CNG in confined spaces?

Insufficient oxygen levels significantly increase the hazards associated with LPG (liquefied petroleum gas) and CNG (compressed natural gas) in confined spaces because these gases displace air when they leak. In a confined space, a leak could lead to a reduction in the available oxygen necessary for combustion, which can create a more dangerous environment. Additionally, the lack of oxygen can lead to asphyxiation for individuals working in or entering the confined area, making it critical to monitor oxygen levels constantly when using these fuels. Understanding oxygen requirements is essential for maintaining safety in environments where LPG or CNG is used, particularly because both gases can affect combustion efficiency and create hazardous conditions.