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It Takes Energy to Get Energy

  • Roger BoydEmail author
Chapter
Part of the SpringerBriefs in Energy book series (BRIEFSENERGY)

Abstract

Imagine you are a prehistoric hunter-gatherer. Your primary motivation is to find food, as that is your only source of the energy which your body needs to stay alive and without it you will slowly starve and die. The balance between the amount of food energy gained in hunting and gathering, and the amount of energy expended in those activities is critical. If that ratio is not high enough you will still die from starvation, just more slowly than if you had no food at all. Let us say that for every usable calorie of energy you gain, you expend 1 calorie in the hunting and gathering process. Then you would be fine, would you not? Unfortunately not, as you would still starve to death, just even more slowly. Your body has a whole host of functions which are not directly related to finding food but critical to your survival. First of all, there is the need for water, without which you will die in about 5–10 days. Then, you have to digest the food, to transform it into useful calories, and you have to excrete the processed food and water otherwise your bladder and intestines would swell up rendering you painfully immobile. So, let us say all these other functions require a doubling of calorific intake, so you now get 2 calories for every calorie spent hunting and gathering. Now you are good, right? Still the answer is no as the human body also has the annoying need to sleep for approximately one third of the day otherwise you will slowly malfunction and start going somewhat mad. So, let us add another calorie for that. Therefore, 3 calories gained for every calorie spent in hunting and gathering make for a good balance.

Keywords

Wind Farm British Thermal Unit Coal Coal Solar Solar Current Living Standard 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Heinberg R (2009) Searching for a miracle, Post Carbon Institute. http://www.postcarbon.org/new-site-files/Reports/Searching_for_a_Miracle_web10nov09.pdf
  2. 2.
    Fischer-Kowalski M et al (2011) Sociometabolic transitions in subsistence communities: Boserup revisited in four comparative case studies. Hum Ecol Rev 18(2):2011Google Scholar
  3. 3.
    Tainter J (1988) The collapse of complex societies. Cambridge University Press, CambridgeGoogle Scholar
  4. 4.
    Diamond J (2004) Collapse: how societies choose to fail or succeed. Viking Adult, New YorkGoogle Scholar
  5. 5.
    Fagan B (2003) The long summer. Basic Books, New YorkGoogle Scholar
  6. 6.
    Bachhuber C, Roberts G (2009) Forces of transformation: the end of the bronze age in the mediterranean (BANEA Monograph). Oxbow Books, OxfordGoogle Scholar
  7. 7.
    Dickinson O (2007) The Aegean from Bronze Age to Iron Age: continuity and change between the twelfth and eighth centuries BC. Routledge, LondonGoogle Scholar
  8. 8.
    Morris I (2010) Why the West rules—for now: the patterns of history, and what they reveal about the future. Farrar, Strauss, and Giroux, LondonGoogle Scholar
  9. 9.
    N/A (2011) Jevons’ coal question: Why the UK coal peak wasn’t as bad as expected. The oil drum. http://www.theoildrum.com/node/8241. Accessed 27 Dec 2012
  10. 10.
    Hall C (2012) Energy and the wealth of nations: understanding the biophysical economy. Springer, New YorkCrossRefGoogle Scholar
  11. 11.
  12. 12.
    Mearns E (2012) Unconventional oil and gas, a game changer? Presented at the 2012 Association for Peak Oil conference. http://www.aspo2012.at/wp-content/uploads/2012/06/Mearns_aspo2012.pdf. Accessed 12 March 2013
  13. 13.
    Talberth J (2009) Economic feasibility of coal to liquids development in Alaska’s interior, Centre for Sustainable Economy. http://www.sustainable-economy.org/main/news/1. Accessed 10 March 2013
  14. 14.
    Efstathiou Jr J (2013) Rig grounding revives debate over Shell’s arctic drilling, Bloomberg. http://www.bloomberg.com/news/2013-01-03/rig-grounding-revives-debate-over-shell-s-arctic-drilling.html. Accessed 15 March 2013
  15. 15.
    N/A (2012) Coal facts 2011, World Coal Association. http://www.worldcoal.org/resources/coal-statistics/. Accessed 25 May 2013
  16. 16.
    N/A (2012) Yearbook 2012: global market energy review, Enerdata. http://www.enerdata.net/enerdatauk/press-and-publication/publications/world-energy-statistics-supply-and-demand.php. Accessed 9 March 2013
  17. 17.
    N/A (2012) China to restrict coal demand, output to 3.9 billion tons, Bloomberg. http://www.bloomberg.com/news/2012-03-22/china-to-restrict-coal-demand-output-to-3-9-billion-tons.html. Accessed 10 March 2013
  18. 18.
    Melling A (2010) Natural gas pricing and its future: Europe as the battleground, Carnegie endowment. http://www.carnegieendowment.org/files/gas_pricing_europe.pdf. Accessed 11 March 2013
  19. 19.
    Romm J (2013) Bridge to nowhere? NOAA confirms high methane leakage rate of up to 9% from gas fields, cutting climate benefit, think progress. http://thinkprogress.org/climate/2013/01/02/1388021/bridge-to-nowhere-noaa-confirms-high-methane-leakage-rate-up-to-9-from-gas-fields-gutting-climate-benefit/. Accessed 20 May 2013
  20. 20.
  21. 21.
    Schneider M, Froggart A, Thomas S (2012) The World Nuclear Industry Status Report 2010–2011. Worldwatch. http://www.worldwatch.org/system/files/NuclearStatusReport2011_prel.pdf. Accessed 11 May 2013
  22. 22.
    N/A (2012) Global statistics. Global Wind Energy Council. http://www.gwec.net/global-figures/graphs/. Accessed 15 May 2013
  23. 23.
  24. 24.
    Hall C, Dale B, Pimentel D (2011) Seeking to understand the reasons for different energy return on investment (EROI). Estimates for biofuels, sustainability 2011, 3. http://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&ved=0CG0QFjAI&url=http%3A%2F%2Fwww.mdpi.com%2F2071-1050%2F3%2F12%2F2413%2Fpdf&ei=670vUYLGDuSMyAHOzoD4AQ&usg=AFQjCNEmKNyJNNb8PdlA2_isXKlJQAtvUg&bvm=bv.43148975,d.aWc. Accessed 15 May 2013
  25. 25.
    Reed S (2013) North Africa’s prospects as energy goliath are fading. New York Times. http://www.nytimes.com/2013/02/23/business/global/23iht-natgas23.html?_r=0. Access 25 May, 2013.
  26. 26.
    Lambert H, Balogh P, Gupta A (2012) EROI of global energy resources: preliminary status and trends. State University of New York. http://www.dpuc.state.ct.us/DEEPEnergy.nsf/fb04ff2e3777b0b98525797c00471aef/a546c841171f7a8485257ac90053565a/$FILE/R.%20Fromer%20Attachment%20-%20EROI%20of%20Global%20Energy%20Resoruces.pdfAccessed at May 26 2013
  27. 27.
    Raugei M et al (2012) The energy return on energy investment (EROI) of photovoltaics: methodology and comparisons with fossil fuel life cycles. Brookhaven National Laboratory: U.S. Department of Energy. http://www.bnl.gov/pv/files/pdf/241_Raugei_EROI_EP_revised_II_2012-03_VMF.pdf and http://www.nytimes.com/2013/02/23/business/global/23iht-natgas23.html?_r=0
  28. 28.
    Prieto P, Hall C (2013) Spain’s photovoltaic revolution. The Energy Return on Investment. Springer, New YorkCrossRefGoogle Scholar

Copyright information

© Roger Boyd 2013

Authors and Affiliations

  1. 1.Vice President (Retired), Bank of MontrealTorontoCanada

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