Different Definitions Of Key Terms

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Definitions of key terms
However, looking at the conceptual perspective, Colwell, R. R., and J. D. Walker (1977, cited in Aniefiok E. Ite1, et al., 2013: p 78-79) defines oil as follows:

“Oil is a naturally stirring multipart mixture made up primarily of hydrocarbon mixtures and normally contains substantial quantities of nitrogen, sulphur, and oxygen together with smaller amounts of nickel, vanadium, and numerous components. Oil compounds can occur in solid form as asphalt, liquid form as crude oil and/or gaseous form as natural gas. Petroleum hydrocarbons could be divided into four classes: saturates (pentane, hexadecane, octacosane, cyclohexane), aromatics (naphthalene, phenanthrene, benzene, pyrene), asphaltenes (phenols, fatty acids, ketones, esters, and porphyrins), and resins (pyridines, quinolines, carbazoles, sulfoxides and amides)”. : P 78-79
Natural gas is the world 's third major energy source, estimated at 21% of total prime energy usage (www.indexmundi.com/commodities/market). On the other hand, environmental risks are consequences that result from oil exploration to the communities (e.g. workers, consumers and local people).

2.0 Introduction
This chapter focuses on what other scholars have written about risks associated with oil and gas exploration, drilling and extraction in various parts of the World. The chapter is structured in accordance with the objectives of the study, that is, to assess the
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