الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Another problem with petroleum fuels is their uneven distribution in the world; for example, the Middle East has 63% of the global reserves and is the dominant supplier of petroleum. This energy system is unsustainable because of equity issues as well as environmental, economic, and geopolitical concerns that have far-reaching implications. The current global energy mix consists of oil (36%), natural gas (24%), coal (28%), nuclear (6%), and renewable energy such as hydro, wind, and solar (about 7%). Once the energy picture has been established we will explore the effect the projected changes in energy supply may have on the world population. Petroleum is the largest single source of energy consumed by the world’s population, exceeding coal, natural gas, nuclear, hydro, and renewable. While fossil fuels are still being created today by underground heat and pressure, they are being consumed more rapidly than they are being created. Hence, fossil fuels are considered nonrenewable; that is, they are not replaced as fast as they are consumed. And due to oil’s aforementioned looming scarcity, the future trend is toward using alternative energy sources. Fortunately, the technological advances are making the transition possible (Kirtay, 2009).