Empirical research in Economics - Prices of natural gas

Natural gas is the cleanest and safest between primary fuels. In its pure form is a flammable gas without color, shape and smell. During its combustion, unlike other fossil fuels released into the air, much less pollutants. Energy from natural gas is widely used for heating, cooking, power generation or propulsion of motor vehicles.
It's energy needs for natural gas rose to the level of importance in our society and our lives.
Natural gas is a flamble mixture of hydrocarbon gases. While natural gas is composed mainly of methane, can also ethane, propane, butane and pentane. The composition of natural gas can vary widely, but below is a table that describes the typical composition of natural gas and refined.