- Chemistry : The science of matter, or of the electrical or electrostatical interactions of matter.
- Natural gas : A gas consisting primarily of methane (CH4) which is found as raw natural gas in underground reservoirs, as gas associated with underground reservoirs of petroleum crude oil, as undersea methane hydrates and as coalbed methane in underground coal mines.
- Ammonia production : The processes for the manufacture of hydrogen (H2) and ammonia (NH3).
- Clathrate : Crystalline solids which occur when water molecules form a cage-like structure around smaller 'guest molecules'
- Gas to liquid catalysis : A family of industrial reactions that can convert trapped natural gas to more useful chemicals, at somewhat lower cost than other processes in the petroleum industry
- Global warming : The increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation.
- Greenhouse effect : A general attribute of planets and moons with atmospheres denoting an imbalance between surface radiation and top-of-atmosphere radiation due to the presence of greenhouse gases.
- Greenhouse gas : Gases in the atmosphere that absorb and emit long-wave radiation.
- Haber process : A chemical process used to produce ammonia — a compound important in many branches of organic chemistry — from the elements nitrogen and hydrogen.
- Liquefied natural gas : Natural gas (predominantly methane, CH4) that has been converted into liquid form for ease of transport and storage.
- Natural gas processing : Industrial facilities that process raw natural gas to remove contaminants as well as to separate out and recover by product natural gas liquids.