Petrochemistry, the study of chemistry and chemical processes of petroleum and its derivatives, can be substituted with several other terms. These include Petroleum Chemistry, Oil Chemistry, Fuel Chemistry, and Hydrocarbon Chemistry. The field primarily focuses on understanding the properties and composition of natural gas, crude oil, and other hydrocarbons, as well as the chemical reactions involved in refining them into usable products such as fuels, lubricants, and plastics. Other branches of chemistry closely related to petrochemistry include materials science, environmental chemistry, and biochemistry. Regardless of the synonym used, petrochemistry remains a crucial field in the global petroleum industry and has far-reaching impacts on the economy and the environment.