Many of us use methane fuel (CH4), commonly referred to as normal gas, at home for cooking. Once the gas is heated (by a flame or spark) and if there is enough oxygen in the atmosphere, the molecules will break aside and reform fully as drinking water and carbon dioxide. https://carparkextractsystems69911.myparisblog.com/37296874/the-basic-principles-of-fire-rated-ductworth-insulation