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Agroecosystem energy, ecological human imprint and economic sustainability: Analysis and impacts
Autori/Curatori: Safwat H. Shakir Hanna, Gian Paolo Cesaretti 
Anno di pubblicazione:  2020 Fascicolo: 2  Lingua: Inglese 
Numero pagine:  31 P. 147-177 Dimensione file:  275 KB
DOI:  10.3280/RISS2020-002009
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Agroecosystem energy is an essential part of the natural resources available to humans for use and the continuation of Earth’s life cycle. Without energy, life on this Earth will stop, and the drivers of all ecological life cycles will not be able to continue function. Energy is an essential factor that makes the working process of human survivability possible. According to World Population Clock, the current status of human population growth is in an alarming situation (i.e., 7.81 billion people and continues to increase) [World Population Clock 2020 Accessed September 20, 2020][ World Population Clock, 2020). Therefore, the ecological human imprint will impact all Earth’s natural resources, in the forms of more consumptions and demands that will have impacts on the global social and economic issues globally. Sustainability will be accomplished if we live within the concept of Nature, controlling our human population growth to reduce the impacts on natural resources’ demands. In this respect, sustainability will not be achieved by economic growth alone; instead, the biosphere natural resources must replenish it and allow the natural resources to regenerate itself to support the growing human population. The present paper will assess the agroecosystem energy continuing ongoing demands and availability concerning human population growth by modeling different scenarios. According to our model, the human population growth will reach 10 billion people or more by the year 2050 at the current trend, and we may be faced with shortening the availability of energy. It is important to stress that the energy should be replenished through non-tradition energy supply, and we have to concentrate on renewable energy, which we can develop to the extent of harvesting this energy in efficient ways. An example of the needs of energy in the agroecosystem is to calculate how much enough the Earth has to support the human beings. In this regard, if each human being is in need of 2000 calories/per day on average, this means that globally the Earth has to produce more than 5694 trillion calories per year. The question is whether the Earth can create these calories to support 7.81 billion people, and we need more calories when the human population grows to be more than 7.81 bil lion people. Therefore, engineering of the Earth agroecosystem should be significant, and we have to think about how we accomplish it. Additionally, we need to sustain our environment by conserving our water resources and keeping our global climate environmentally in the best condition to maintain international economic and social standards. Further, in this paper, we will discuss the impacts of changing different parameters that affect global agroecosystem energy.

Keywords: Agroecosystem Energy Model (AEM), Sustainable Development, Human Population, Human Imprint.

  1. Bloom D.E. (2011). 7 Billion and Counting. Science, 333: 562-569.
  2. EEA (2011). The European environment - state and outlook 2010: assessment of global megatrends. European Environment Agency, Copenhagen, Denmark. EEA European Environment Agency (2013). State and Outlook 2013: Assessment of Global Megatrends, an Update., European Environment Agency, Copenhagen, Denmark.
  3. EEA European environment (2015) – State and outlook 2015: Assessment of global megatrends. Copenhagen, Denmark: European Environment Agency.
  4. FAO (2009). The state of food insecurity in the world. Economic crises – impacts and lessons learnt. United Nations Food and Agriculture Organization, Rome., 2009a.
  5. FAO (2015). The State of Food Insecurity in the World, Meeting the international hunger targets: taking stock of uneven progress.
  6. FAO (2017). The future of food and agriculture - Trends and challenges: Food and Agriculture Organization of the United Nations, Rome.
  7. FAO (2017). How to feed the world in 2050, Issue brief for the High-level Expert Forum: -- ( accessed 20 May 2017. FAO (2017). FAO-IPCC expert meeting on climate change, land use and food security. Roma, Italy, p. 156, 2017. --, (2017) The sustainable scale project, 2020 (Accessed September 19, 2020).
  8. Krenz K.H. (1976). Energy conversion and utilization. p. 359.
  9. Millennium Ecosystem Assessment (2005). ‘Ecosystems and Human Well-being: Synthesis’. Millennium Ecosystem Assessment, 2005. Island Press, Washington, DC., p. 155.
  10. NASA, “Solar Radiation and Climate Experiment (SORCE)” 2017. -- Accessed on July 19, 2017).
  11. Perlack R.D., Stokes B.J. (2011). U.S. Billion-Ton Update: Biomass Supply for a Bioenergy and Bio-products Industry. Oak Ridge National Laboratory, report., p. 2.
  12. PRB Org. (2017). Human Population: Environment. --
  13. PRB Org. (2017). ‘Annual Renewable Freshwater Availability per Capita’. --, Accessed on July 19.
  14. Rancourt D.G. (2008). Radiation physics constraints on global warming, p. 22. Rancourt D.G. (2011). Radiation physics constraints on global warming, p. 15.
  15. Richmond B. (2001). STELLA An Introduction to System Thinking High Performance Systems. Inc. The System Thinking Company.
  16. Sakschewski B., Bloh W.V., Hube V., Müllera C., Bondeau A. (2014). Feeding 10 billion people under climate change: How large is the production gap of current agricultural systems2). Ecological Modelling, 288: 103-111.
  17. Shakir-Hanna S.H., Osborne-Lee I.W. (2011). Sustainable economy of the ecological footprint: Economic analysis and impacts. In: Ecosystems and Sustainable Development. VIII. South Hampton UK: WIT Press, 313-326.
  18. Shakir-Hanna S.H., Osborne-Lee I.W. (2012). Modeling and Evaluating the Global Energy Flow in Ecosystems and its Impacts on the Ecological Footprint. In: Models of the Ecological Hierarchy: From Molecules to Ecosphere. Elsevier B.V., pp. 469-498.
  19. Shakir-Hanna S.H., Harris K.T., Osborne-Lee L.W., Cesaretti G.P., Misso R., Andreopoulou Z.S. (2014). Global Ecological Human Imprint, Sustainable Development and Environment: Assessment and Impacts. European Journal of Sustainable Development, 3(3): 1-24.
  20. SPSSSCIENC. (2002). Sigmaplot Version 8. -- www.spssscience. com/sigmaplot. Tello E.. Galánb E., Sacristán V., Cunfer G., Guzmán G.I., González de Molina M., Krausmann F.S., Padró R., Marco I., Moreno-Delgado D. (2016). Opening the black box of energy throughputs in farm systems: A decomposition analysis between the energy returns to external inputs, internal biomass reuses and total inputs consumed (the Vallès County, Catalonia, c.1860 and 1999). Ecological Economics, 121: 160-174.
  21. consumed (the Vallès County, Catalonia, c.1860 and 1999). Ecological Economics, 121: 160-174.
  22. U. K. ECOTECU (2001). Ecological Footprint., European Parliament, Directorate-General for Research, Directorate A. The STOA Programme March. Wackernagel M., Onisto L., Bello P., Linares A. C., Falfán I.S., García J.M., Guerrero A.I., Suárez G., Guerrero M.G.S. (1999). National natural capital accounting with the ecological footprint concept. Ecol. Econ., 29: 375-390.
  23. Wackernagel M., Schulz N. B., Deumling D., Linares A.C., Jenkins M., Kapos V., Monfreda C., Loh J., Myers M., Norgaard R., Randers J. (2002). Tracking the ecological overshoot of the human economy. PNAS, 99: 9266-9271.
  24. World Bank (2017). Data Series and Research. The World Bank organization. -- www.worldbank.org1960-2008.
  25. World Population Clock (2020) Accessed September 20, 2020.

Safwat H. Shakir Hanna, Gian Paolo Cesaretti, in "RIVISTA DI STUDI SULLA SOSTENIBILITA'" 2/2020, pp. 147-177, DOI:10.3280/RISS2020-002009


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