Natural gas

Natural gas is a fossil fuel, naturally occurring in geological formations. Typically, the gas is a mix of gaseous hydrocarbons, primarily methane (95%), small amounts of higher alkanes, and traces of carbon dioxide and nitrogen, hydrogen sulfide and helium. Methane is a colorless and odorless gas, and, after carbon dioxide, is the second-greatest greenhouse gas that contributes to global climate change.

Because natural gas is odorless, a commercial odorizer, such as methanethiol, that smells of hydrogen sulfide is added to the gas for the ready detection of gas leaks.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 2.0

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