Natural Gas:  
A hydrocarbon gas mixture consisting primarily of methane and other carbon based gasses like ethane/ethylene and propane/propylene.


Market Dynamics:

The US Natural Gas market/price is primarily dependent upon climate/temperature. During the colder months, the price of natural gas goes up due to demand for heating homes and businesses. Further, some manaufacturing that uses natural gas as a raw material (ammonia/methanol/acetic acid) will go down for maintance while the price for natural gas is high. 

Up Stream Materials/Building Blocks:

Crude oil

Frack-ed Oil Wells are particularly rich in natural gas
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Down Stream Materials Consuming Natural Gas:

Acetic Acid

Acetone

Butane

Butanol (1,2)

Diethanolamine

Diisopropylamine

Dimethylformamide

Ethyl acetate

Ethylene

Ethylene Glycol

Formaldehyde

Glycerol

Isopyropyl Alcohol (IPA)

Methanol

Polyethylene Glycol (PEG)

Polypropylene 

Propanediol (1,2)

Propanol (1,2)

Propylene

Propylene Glycol

Triethylamine (TEA)

Various polymers that are ethylene/propylene based