What is the specific gravity of natural gas?

Natural gas primarily consists of methane, which typically has a specific gravity of around 0.60 when compared to air. This value is significant in the context of gas safety and combustion, as specific gravity helps determine how gas will behave in varying environments. Since specific gravity is the ratio of the density of a substance to the density of a reference substance (air for gases), a specific gravity of 0.60 indicates that natural gas is lighter than air. This characteristic is crucial in safety considerations because, in the event of a leak, natural gas will rise and disperse into the atmosphere rather than accumulate at ground level, reducing the risk of potentially dangerous situations such as explosions. The other options represent values for different gases or are incorrect for natural gas, making the specified value of 0.60 the accurate one for natural gas.