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The cubic mile of oil (CMO) is a unit of energy. It was created by Hew Crane of SRI International to aid in public understanding of global-scale energy consumption and resources. Significant sources of energy include oil, coal, natural gas, nuclear, hydroelectric, and biomass (primarily the burning of wood). Other energy sources include geothermal, wind, photovoltaic, and solar thermal. The various energy units commonly used to measure these sources (e.g., joules, BTUs, kilowatt hours, therms) are only somewhat familiar to the general public,〔(【引用サイトリンク】title="Energy and the Environment" - The Basics )〕 and their relationships can be confusing.〔"The mixture of terms for essentially one entity (energy) leads to confusion, especially among citizens who need to be aware, now more than ever, of energy consumption patterns." http://www.justjoules.org/〕 These common energy units are sized for everyday activities (a joule is the energy required to lift a small apple one metre vertically). For regional, national, and global scales, larger energy units, such as the exajoule, the billion barrels of oil equivalent (BBOE) and the quad are used. Derived by multiplying the small common units by large powers of ten these larger units pose additional conceptual difficulties for many citizens. Crane intended the cubic mile of oil to provide a visualizable scale for comparing the contributions of these diverse energy components as a percentage of total worldwide, energy use. The global economy consumes approximately 30 billion barrels of oil (1.26 trillion U.S. gallons or 4.75 trillion litres) each year.〔 〕 Numbers of this magnitude are difficult to conceive by most people.〔 The volume occupied by one trillion U.S. gallons is about one cubic mile. Crane felt that a cubic mile would be an easier concept for the general public than a trillion gallons. ==Definition and energy equivalents== The CMO is the energy released by burning a cubic mile of oil. Conversions to other units may be calculated based on the barrel of oil equivalent (BOE), an approximation of the energy released by burning one 42-US-gallon barrel of crude oil. Since one BOE is about 〔http://www.irs.gov/pub/irs-drop/n-99-18.pdf〕 and one cubic mile is about :〔 〕 : 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cubic mile of oil」の詳細全文を読む スポンサード リンク
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