Natural gas is a naturally occurring hydrocarbon gas. It consist of mainly methane and other hydrocarbon.
Combustion of natural gas is exothermic in nature and have better efficiency as it produce 30% less carbon dioxide than petroleum therefore it is clean fuel and use widely for domestic purposes.
The balanced equation for the combustion of natural gas is
CH4 + 2O2 → CO2 + 2H2O
Regards