| Energy Facts Resources Fossil fuel Remaining reserves of conventional fossil fuels are estimated as: Fuel Energy reserves in ZJ Coal 290.0 Oil 18.4 Gas 15.7 Significant uncertainty exists for these numbers. The estimation of the remaining fossil fuels on the planet depends on a detailed understanding of the Earth crust. This understanding is still less than perfect. While modern drilling technology makes it possible to drill wells in up to 3 km of water to verify the exact composition of the geology, one half of the ocean is deeper than 3 km, leaving about a third of the planet beyond the reach of detailed analysis. At the same time, long before fossil fuels run out, the effect of continuing to use them at current rates would cause havoc to the climate through global warming.[33] These figures may be too optimistic. Energy Watch Group reports show that we already cannot supply the demand for oil[34] and that uranium resources will be exhausted within 70 years. [35] Coal Coal is the most abundant fossil fuel. According to the International Energy Agency the proven reserves of coal are around 909 billion tonnes, which could sustain at the current production rate for 155 years.[36] This was the fuel that launched the industrial revolution and has continued to grow in use; China, which already has many of the world's most polluted cities,[37] was in 2007 building about two coal fired power plants every week.[38][39] Coal is the fastest growing fossil fuel and its large reserves would make it a popular candidate to meet the energy demand of the global community, short of global warming concerns and other pollutants.[40] With the Fischer-Tropsch process it is possible to make liquid fuels such as diesel and jet fuel from coal. The Stop Coal campaign calls for a moratorium on the construction of any new coal plants and on the phase out of all existing plants, citing concern for global warming.[41] In the United States, 49% of electricity generation comes from burning coal.[42] Oil It is estimated that there may be 57 ZJ of oil reserves on Earth (although estimates vary from a low of 8 ZJ,[1] consisting of currently proven and recoverable reserves, to a maximum of 110 ZJ consisting of available, but not necessarily recoverable reserves, and including optimistic estimates for unconventional sources such as tar sands and oil shale. Current consensus among the 18 recognized estimates of supply profiles is that the peak of extraction will occur in 2020 at the rate of 93-million barrels per day (mbd). Current oil consumption is at the rate of 0.18 ZJ per year (31.1 billion barrels) or 85-mbd. There is growing consensus that peak oil production may be reached in the near future, resulting in severe oil price increases.[43] A 2005 French Economics, Industry and Finance Ministry report suggested a worst-case scenario that could occur as early as 2013.[44] There are also theories that peak of the global oil production may occur in as little as 2-3 years. The ASPO predicts peak year to be in 2010. Some other theories present the view that it has already taken place in 2005. World oil production decreased from 84.63 mbd in 2005 to 84.60 mbd in 2006 but increased in 2007 to 84.66 mbd, and is projected to increase to 87.70 mbd in 2009. One definition of peak is the inability to meet demand, which has already occurred.[45][46] Sustainability Political considerations over the security of supplies, environmental concerns related to global warming and sustainability will move the world's energy consumption away from fossil fuels. The concept of peak oil shows that we have used about half of the available petroleum resources, and predicts a decrease of production. A government led move away from fossil fuels would most likely create economic pressure through carbon emissions trading and green taxation. Some countries are taking action as a result of the Kyoto Protocol, and further steps in this direction are proposed. For example, the European Commission has proposed that the energy policy of the European Union should set a binding target of increasing the level of renewable energy in the EU's overall mix from less than 7% today to 20% by 2020.[47] The Easter Island Effect is cited as an example of a culture that was unable to develop sustainability and depleted nearly 100% of its natural resources.[48] Nuclear power Nuclear fission The International Atomic Energy Agency estimates the remaining uranium resources to be equal to 2500 ZJ.[49] This assumes the use of Breeder reactors which are able to create more fissile material than they consume. IPCC estimated uranium deposits for once-through fuel cycles reactors to be only 17 ZJ but then they go on to say that exploration for uranium is still at its infancy.[50] Resources and technology do not constrain the capacity of nuclear power to contribute to meeting the energy demand. However, political and environmental concerns about nuclear safety and radioactive waste started to limit the growth of this energy supply at the end of last century, particularly due to a number of nuclear accidents. Concerns about nuclear proliferation mean that the development of nuclear power by countries such as Iran is being actively discouraged by the international community. Nuclear fusion Fusion power is the process driving our sun and other stars. It generates large quantities of heat by fusing the nuclei of hydrogen isotopes. The heat can theoretically be harnessed to generate electricity. The temperatures and pressures needed to sustain fusion make it a very difficult process to control and doing so is an unsolved technical challenge. The tantalizing potential of fusion is its theoretical ability to supply vast quantities of energy, with relatively little pollution.[51] Both the United States and the European Union are supporting a moderate level of fusion-based research, along with other countries. Renewable resources Renewable resources are available each year, unlike non-renewable resources which are eventually depleted. A simple comparison is a coal mine and a forest. While the forest could be depleted, if it is managed properly it represents a continuous supply of energy, vs the coal mine which once it has been exhausted is gone. Most of earth's available energy resources are renewable resources. Renewable resources account for more than 93 percent of total U.S. energy reserves. Annual renewable resources were multiplied times thirty years for comparison with non-renewable resources. In other words, if all non-renewable resources were uniformly exhausted in 30 years, they would only account for 7 percent of available resources each year, if all available renewable resources were developed.[52] Solar energy Renewable energy sources are even larger than the traditional fossil fuels and in theory can easily supply the world's energy needs. 89 PW[9] of solar power fall on the planet's surface. While it is not possible to capture all, or even most, of this energy, capturing less than 0.02% would be enough to meet the current energy needs. Barriers to further solar generation include the high price of silicon used to make solar cells, reliance on weather patterns to generate electricity and a lack of space for solar cells in areas of high demand, such as cities. Also, solar generation does not produce electricity at night, which is a particular problem in high northern and southern latitude countries; energy demand is highest in winter, while availability of solar energy is lowest. Globally, solar generation is the fastest growing source of energy, seeing an annual average growth of 35% over the past few years. Japan, Europe, China, U.S. and India are the major growing investors in solar energy. Advances in technology and economies of scale, along with demand for solutions to global warming, have led photovoltaics to become the most likely candidate to replace nuclear and fossil fuels.[53] Wind power The available wind energy estimates range from 300 TW to 370 TW.[9] Using the lower estimate, just 5% of the available wind energy would supply the current worldwide energy needs. Most of this wind energy is available over the open ocean. The oceans cover 71% of the planet and wind tends to blow stronger over open water because there are fewer obstructions. Wave and tidal power At the end of 2005, 0.3 GW of electricity was produced by tidal power. [3] Due to the tidal forces created by the Moon (68%) and the Sun (32%), and the Earth's relative rotation with respect to Moon and Sun, there are fluctuating tides. These tidal fluctuations result in dissipation at an average rate of about 3.7 TW. [54] As a result, the rotational speed of the Earth decreases, and the distance of the Moon to the Earth increases, on geological time scales. In several billion years, the Earth will rotate at the same speed as the Moon is revolving around it. So, several TW of tidal energy can be produced without having a significant effect on celestial mechanics. Another physical limitation is the energy available in the tidal fluctuations of the oceans, which is about 0.6 EJ (exajoule). [55] Note this is only a tiny fraction of the total rotational energy of the Earth. Without forcing, this energy would be dissipated (at a dissipation rate of 3.7 TW) in about four semi-diurnal tide periods. So, dissipation plays a significant role in the tidal dynamics of the oceans. Therefore, this limits the available tidal energy to around 0.8 TW (20% of the dissipation rate) in order not to disturb the tidal dynamics too much.[citation needed] Waves are derived from wind, which is in turn derived from solar energy, and at each conversion there is a drop of about two orders of magnitude in available energy. The energy fluxes of waves that wash against our shores add up to 3 TW. [56] Geothermal Estimates of exploitable worldwide geothermal energy resources vary considerably. According to a 1999 study, it was thought that this might amount to between 65 and 138 GW of electrical generation capacity 'using enhanced technology'.[57] A 2006 report by MIT that took into account the use of Enhanced Geothermal Systems (EGS) concluded that it would be affordable to generate 100 GWe (gigawatts of electricity) or more by 2050, just in the United States, for a maximum investment of 1 billion US dollars in research and development over 15 years.[29] The MIT report calculated the world's total EGS resources to be over 13 YJ, of which over 200 ZJ would be extractable, with the potential to increase this to over 2 YJ with technology improvements - sufficient to provide all the world's energy needs for several millennia.[29] Biomass Production of biomass and biofuels are growing industries as interest in sustainable fuel sources is growing. Utilizing waste products avoids a food vs fuel trade-off, and burning methane gas reduces greenhouse gas emissions, because even though it releases carbon dioxide, carbon dioxide is 23 times less of a greenhouse gas than is methane. Biofuels represent a suststainable substitute for fossil fuels, but their net impact on greenhouse gas emissions depends on the agricultural practices used to grow the plants used as feedstock to create the fuels. While it is widely believed that biofuels can be carbon-neutral, there is evidence that biofuels produced by current farming methods are substantial net carbon emitters.[58][59][60] Hydropower Hydroelectric power now supplies about 715,000 MWe or 19% of world electricity (16% in 2003).[citation needed] Large dams are still being designed. Nevertheless, hydroelectric power is probably not a major option for the future of energy production in the developed nations because most major sites within these nations are either already being exploited or are unavailable for other reasons, such as environmental considerations Source: Wikipedia, the free encyclopedia |





| Unleash Power For The People A charitable organization that has one deliverable but 3 benefits. We deliver a renewable power generator to communities in the world without electricity. (over 2 billion people possible) Our 3 benefits are to help poor people, help the environment, and to educate the world about the need to use renewable energy to permanently solve poverty. |