Natural gas and petroleum are both fossil fuels that are formed from organic matter over millions of years. They are often found together in underground reservoirs, as natural gas is often trapped in pockets of petroleum. Both natural gas and petroleum are used as sources of energy and fuel for heating, transportation, and electricity generation, and are vital components of the global energy supply. While they are similar in many ways, they have different chemical compositions and are used for different purposes. Additionally, natural gas is often considered a cleaner-burning fuel compared to petroleum, as it produces fewer greenhouse gas emissions when burned.
