What is an essential step in the safe storage of gas cylinders?

Storing gas cylinders in a well-ventilated area is crucial for safety. This practice helps to prevent the accumulation of gas that might leak from a cylinder, significantly reducing the risk of creating an explosive or hazardous environment. Well-ventilated spaces allow any potential gas escape to dissipate quickly, minimizing the chance of ignition.

In contrast, keeping cylinders in a confined space or near highly flammable materials increases the risk of fire and explosion. If gas were to leak, it would have nowhere to go in a confined space, raising the likelihood of dangerous concentrations forming. Furthermore, leaving cylinders disconnected from the regulator doesn't inherently promote safe storage; it does not directly address the key safety concern of ventilation and could lead to risks if the cylinder is not properly secured or stored upright.