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Carbon based fuel is any fuel whose energy derives principally from the oxidation or burning of carbon. Carbon based fuels are of two main kinds, biofuels and mainly fossil fuels. Whereas biofuels are derived from recent-growth organic matter and are typically harvested, as with logging of forests and cutting of corn, fossil fuels are of prehistoric origin and are extracted from the ground, the principal fossil fuels being oil, coal, and natural gas.

From an economic policy perspective, an important distinction between biofuels and fossil fuels is that only the former is sustainable or renewable. Whereas we can continue to obtain energy from biofuels indefinitely in principle, the earth's reserves of fossil fuels was determined millions of years ago and is therefore fixed as far as our foreseeable future is concerned, although the great variability in the ease of extraction of fossil fuels makes its endgame scenario one of increasing prices over one or more centuries rather than of abrupt exhaustion.

From the perspective of climate and ecology, biofuels and fossil fuels have in common that they contribute to the production of atmospheric carbon dioxide, which has emerged in recent decades as the fastest-changing greenhouse gas. However biofuels actively participate in the carbon cycle today by photosynthesizing carbon dioxide, unlike fossil fuels whose participation was long ago, and can therefore in principle bring atmospheric CO₂ into an equilibrium not possible with the continued use of fossil fuel. In practice photosynthesis is a slow process, and the additional fuel produced by artificial methods of accelerating it such as application of fertilizer tends to be offset by the energy consumed by the accelerating processes,^[1] to a degree currently under active debate^[2]. In contrast the speed of photosynthesis is immaterial for fossil fuels because they had millions of years in which to accumulate.

[edit] See also

• Electric vehicle

[edit] References

[edit] External links

• The Report of the National Advisory Panel on Sustainable Energy Science and Technology, Chapter 5, Carbon-Based Fuels
• "The Coming Energy Crisis?" - essay by James L. Williams of WTRG Economics and A. F. Alhajji of Ohio Northern University
• "Powering the Future" - Michael Parfit (National Geographic)
• "Federal Fossil Fuel Subsidies and Greenhouse Gas Emissions"
• Fossil Fuel Subsidies in Europe
• Biofuels at the Open Directory Project
• Alternative Fueling Station Locator (EERE).
• BioenergyWiki - a wiki on biofuels and related subjects, including bioenergy sustainability.
• How Much Water Does It Take to Make Electricity? -- Natural gas requires the least water to produce energy, some biofuels the most, according to a new study.
• International Conference on Biofuels Standards - European Union Biofuels Standardization
• International Energy Agency: Biofuels for Transport - An International Perspective