Natural gas

Natural gas is a product of the decay of organic material. It is usually found in petroleum fields, but also occurs anywhere that organic material is left to decay, such as landfill sites and swamps. Another name for natural gas is marsh gas.

The primary component of natural gas is methane. Natural gas is important as a major source for electricity generation through the use of gas turbines. Environmentally, natural gas is a relatively clean-burning fuel, although it does produce greenhouse gases.

The major difficulty in the use of natural gas is transport. Natural gas pipelines are the preferred method of transport, but this is impractical across oceans. Liquified natural gas tankers have also been used, but there are some concerns about safety. In many cases, as with oil fields in Saudi Arabia, the natural gas which is recovered in the course of recovering petroleum cannot be profitably sold and it is simply burned at the oil field.