The second of the fossil fuels in this article, natural gas is used as an energy and fuel source. It too relies on supply and demand to arrive at a price but is a rarer material and more expensive to source than crude oil.
Unlike crude oil, the price of natural gas is often driven by our weather conditions; colder weather, for instance, creating a higher demand for natural gas and therefore driving up the price.
Again, in the face of the increasing popularity of green energy, the demand for natural gas may be affected.