| Reference in text | Source – name | Source – details | Source – link | Retrieved on |
| UK quarried stone | Mineral extraction in Great Britain 2013 | gov.uk – Feb 2015 | https://www.gov.uk/government/statistics/mineral-extraction-in-great-britain-2013 | 12/2/2015 |
| Number of blue whales equvilent | Weight of a blue whale | National Geographic – undated | http://animals.nationalgeographic.com/animals/mammals/blue-whale/ | 12/20/2015 |
| Amount of neutron star equivilent | Weight of a teaspoon of neutron star | Cornell University – undated | http://astrosun2.astro.cornell.edu/academics/courses/astro201/neutron_star.htm | 12/20/2015 |
| Number of loaded Titanic equivilents | Titanic statistics | Titanic-Titanic – Dec 2015 | http://www.titanic-titanic.com/titanic_statistics.shtml | 12/20/2015 |
| Fraction of the weight of humanity | The weight of nations | London School of Hygiene & Tropical Medicine – Jun 2012 | http://www.lshtm.ac.uk/newsevents/news/2012/tacking_population_weight_crucial_for_food_security.html | 12/2/2015 |
| US quarried stone | Crush stone statistics and information | US geological survey – Feb 2015 | http://minerals.usgs.gov/minerals/pubs/commodity/stone_crushed/mcs-2015-stonc.pdf | 12/2/2015 |
| Global cement production | Mineral Commodity Summaries – Cement | US geological survey – Feb 2015 | http://minerals.er.usgs.gov/minerals/pubs/commodity/cement/mcs-2015-cemen.pdf | 12/2/2015 |
| the value of meteoric iron | Mesopotamia: The Old Assyrian Period | KR Veenhof, Jesper Eidem, published by Saint-Paul, 2008 | http://books.google.co.uk/books?id=vYMmrenUywQC&pg=PA84&dq=the+old+assyrian+letters+amutum+silver&hl=en&sa=X&ei=VbB3UpHkOYKVhQfG1oHoDA&ved=0CEsQ6AEwAg#v=onepage&q=the%20old%20assyrian%20letters%20amutum%20silver&f=false | 12/20/2015 |
| Energy required to make iron and steel | The energy required to produce materials: constraints on energy-intensity improvements, parameters of demand | Gutowski, Sahni, Allwood, Ashby and Worrell, Philosophical Transactions of the Royal Society, 371, 20120003, Jan 2013 | 12/20/2015 | |
| Average homes calculation and steel torus calculation – world production of steel | Crude steel production, 1980-2014 | World Steel Organisation | https://www.worldsteel.org/dms/internetDocumentList/statistics-archive/production-archive/steel-archive/steel-annually/steel-annually-1980-2014/document/steel%20annually%201980-2014.pdf | 12/2/2015 |
| Average homes calculation – energy used to heat UK average home | Measurement of Domestic Hot Water Consumption in Dwellings | Energy Saving Trust and Defra – 2008 | https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/48188/3147-measure-domestic-hot-water-consump.pdf | 12/2/2015 |
| Average homes calculation – energy saved by recycling steel | How much energy does it take (on average) to produce 1 kilogram of the following materials? | Low-tech magazine – Dec 2014 | http://www.lowtechmagazine.com/what-is-the-embodied-energy-of-materials.html | 12/20/2015 |
| A steel torus – radius of the Earth | earth data from NASA | NASA – undated | http://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html | 12/20/2015 |
| Density of steel | Density of Steel | hypertextbook – undated | hypertextbook.com/facts/2004/KarenSutherland.shtml | 12/20/2015 |
| What is steel used for | Market Applications in Steel | American Iron and Steel Institute – 2014 | http://www.steel.org/About%20AISI/Statistics/Market%20Applications%20in%20Steel.aspx | 12/2/2015 |
| 9% feedstock | DUKES 2015 – Chapter 3 oil (petroleum flow chart) | gov.uk – Jul 2015 | https://www.gov.uk/government/publications/petroleum-chapter-3-digest-of-united-kingdom-energy-statistics-dukes | 12/2/2015 |
| biofuel alternatives to lubricants | novvi | Commercial Website | http://novvi.com/uses/automotive/ | 12/7/2015 |
| Industry and transport carbon emissions | Drivers, Trends and Mitigation | Blanco G., R. Gerlagh, S. Suh, J. Barrett, H.C. de Coninck, C.F. Diaz Morejon, R. Mathur, N. Nakicenovic, A. Ofosu Ahenkora, J. Pan, H. Pathak, J. Rice, R. Richels, S.J. Smith, D.I. Stern, F.L. Toth, and P. Zhou, 2014: Drivers, Trends and Mitigation. In: Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Edenhofer, O., R. Pichs-Madruga, Y. Sokona, E. Farahani, S. Kadner, K. Seyboth, A. Adler, I. Baum, S. Brunner, P. Eickemeier, B. Kriemann, J. Savolainen, S. Schlömer, C. von Stechow, T. Zwickel and J.C. Minx (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. | http://www.ipcc.ch/pdf/assessment-report/ar5/wg3/ipcc_wg3_ar5_chapter5.pdf | 11/24/2015 |
| Industrial and water industry abstraction of water | Estimated abstractions from all surface and groundwaters by purpose and Environment Agency region: 2000 to 2013 | gov.uk – Apr 2015 | https://www.gov.uk/government/statistics/water-abstraction-estimates | 12/2/2015 |
| Cambridge research | Sustainable Materials – with Both Eyes Open: Future Buildings, Vehicles, Products and Equipment – Made Efficiently and Made with Less New Material | Julian Allwood, Jonathan Cullen, UIT Cambridge Nov 2011 | http://www.withbotheyesopen.com/ | 12/20/2015 |
| Stevenage Company | Abbeysteel film – Success Story – Abbey Steel by Renewables East | Resource Efficiency East – Oct 2013 | http://www.abbey-steel.co.uk/welcome/index.php/news/17-company-news/25-abbeysteel-video | 12/20/2015 |
| Ford Motor Company | New Investment in Energy-Efficient Manufacturing | energy.gov – Mar 2013 | http://energy.gov/articles/new-investment-energy-efficient-manufacturing | 12/20/2015 |
| Hisarna | ULCOS program: status & progress (Ultra Low CO2 Steelmaking) | EC – Nov 2010 | http://www.eesc.europa.eu/resources/docs/estep_ulcos_nov_2010.pdf | 12/20/2015 |
| US lightweight metal research – DoD | US Initiative to Develop Lightweight Metals | The Maritime Executive – Jan 2014 | http://www.maritime-executive.com/article/US-Initiative-to-Develop-Lightweight-Metals-2014-03-01 | 12/20/2015 |
| US lightweight metal research – DoE | arpa.e – metals | Advanced Research Projects Agency – Energy – U.S. Department of Energy – undated | http://arpa-e.energy.gov/?q=arpa-e-programs/metals | 12/20/2015 |
| Pulsed laser deposition | Pulsed Laser Deposition | Commercial Website | http://www.andor.com/learning-academy/pulsed-laser-deposition-an-introduction-to-pulsed-laser-deposition | 12/20/2015 |
| Stereolithography | Stereolithography | Commercial Website | http://manufacturing.materialise.com/stereolithography | 12/20/2015 |
| 3D printing body tissue | Researchers Use DNA as ‘Smart Glue’ to Provide Structure for 3D Bio-Printing | 3DPrint.com – Jan 2015 | http://3dprint.com/37388/dna-smart-glue/ | 12/20/2015 |
| 3D print trucks | Amazon Files Patent for Mobile 3D Printing Delivery Trucks | 3DPrint.com – Feb 2015 | http://3dprint.com/46934/amazon-3d-printing-patent/ | 12/20/2015 |
| 3D print at your local library | California Firefighter 3D Prints a Pool Filter Basket with Help from Local Library | 3DPrint.com – Mar 2015 | http://3dprint.com/54685/3d-printed-pool-filter/ | 12/20/2015 |
| Güssing | The European Center of Renewable Energy Güssing | European Centre for Renewable Energy (Güssing) – undated | http://www.eee-info.net/cms/netautor/napro4/appl/na_professional/parse.php?mlay_id=2500&mdoc_id=1000566 | 12/20/2015 |
| Number of visitors to Güssing | Sustainable Tourism IV | Brebbia, Pineda, WIT Press, 2010 | https://books.google.co.uk/books?id=E2iQGWzudxsC&pg=PA61&lpg=PA61&dq=gussing+visitor+numbers&source=bl&ots=uklEWtWBLL&sig=GmckseJgpWLvSgLNJV5EAejZIhU&hl=en&sa=X&ved=0ahUKEwil67K98-rJAhUBHx4KHUVlC9QQ6AEIQDAE#v=onepage&q=gussing%20visitor%20numbers&f=false | 12/20/2015 |
| Off grid metal works | The world’s most unlikely environmentalists? | Economist Films [via YouTube] – Dec 2015 | https://www.youtube.com/watch?v=mwfkEoeBnlU | 12/7/2015 |
a portfolio of interests
Michelle Spaul 