What is Natural Gas?
Natural Gas is colorless, shapeless, and odorless in its pure form. Unlike other fossil fuels, natural gas is clean burning and emits lower levels of potentially harmful byproducts into the air. It is therefore called “Clean Gas’.
The main ingredient in natural gas is methane, a gas (or compound) composed of one carbon atom and four hydrogen atoms.
Natural gas supplies about 23.8 percent of the world’s energy. Gas is extracted by drilling wells deep into the ground, through many layers or rock to reach the gas deposits.
Natural gas comes in two main types:
The first and conventional type is found in permeable sandstone reservoirs. The second, unconventional types are found in other places such as in coal deposits (eg. Coal Steam Gas, CSG) or shale rock formations (eg. Shale Gas)
In recent time, shale gas has become very popular in the USA and is mainly drilled by a process called Hydraulic Fracturing (fracking). It is popular because its carbon emission is about half that of coal, and is seen as environmentally friendlier. The USA is known to be the world_s largest producer of shale gas.
_The International Energy Agency currently estimates that global recoverable shale gas resources stand at 7,345 trillion cubic feet, so it’s conceivable that this resource could one day offer similar benefits to other countries_.
Similar to other energy types, natural gas is burned to produce pressurized gas that spins the blades of turbines. The spinning causes some metal coils and magnets in a generator to produce electrical current, that is connected to a transformer and further supplied to homes.
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