Ambio

, Volume 46, Issue 8, pp 865–877 | Cite as

Persistency of artificial aeration at hypertrophic Lake Tuusulanjärvi: A sociohistorical analysis

  • Paula Schönach
  • Petri Tapio
  • Heidi Holmroos
  • Jukka Horppila
  • Juha Niemistö
  • Nina A. Nygrén
  • Olga Tammeorg
  • Ilmo Massa
Report

Abstract

With present-day scientific evidence challenging the efficiency of artificial aeration as an effective restoration method for eutrophicated lakes, our sociohistorical investigation traces the reasons for the persistent support for this method in Finland, where about one hundred lakes are subject to this treatment. Our study employed the concepts of technological path and aeration frame to analyze the extensive restoration and aeration history of the hypertrophic Tuusulanjärvi in southern Finland. Continuously aerated since 1972, it has the longest history of aeration in Finland. Qualitative analysis of documentary and archival sources revealed that the longstanding preference for aeration in the context of increasing scientific controversy was based on its functional versatility and seemingly unproblematic applicability in regard to shifting emphasis and goal setting of restoration. Additionally, the stability of the aeration frame has been supported by the practical and emotional attachment of local residents to lake restoration, particularly aeration, and finally the problems and contradicting interests related to alternative restoration methods.

Keywords

Artificial aeration Hypertrophic lake Lake restoration Restoration history Technological frame Tuusulanjärvi 

Notes

Acknowledgements

The authors would like to thank research assistant Milja Heikkinen for helping to gather the study material. The study was supported by the Academy of Finland (Grants 263468, 263464, and 286676).

References

  1. Ansoff, I., and E. McDonnell. 1990. Implanting strategic management, 2nd ed. Harlow: Pearson Education.Google Scholar
  2. Arthur, W.B. 1989. Competing technologies, increasing returns, and lock-in by historical events. The Economic Journal 99: 116–131. doi: 10.2307/2234208.CrossRefGoogle Scholar
  3. Beutel, M.W., and A.J. Horne. 1999. A review of the effects of hypolimnetic oxygenation on lake and reservoir water quality. Lake Reservoir Management 15: 285–297. doi: 10.1080/07438149909354124.CrossRefGoogle Scholar
  4. Bijker, W.E. 1997. Of bicycles, bakelites and bulbs: Toward a theory of sociotechnical change, first paperback ed. Cambridge, MA: MIT Press.Google Scholar
  5. Bijker, W.E. 2007. Dikes and dams, thick with politics. Isis 98: 109–123. doi: 10.1086/512835.CrossRefGoogle Scholar
  6. Bijker, W.E., T. Hughes, and T. Pinch. 2012. General introduction. In The social construction of technological systems: New directions in the sociology and history of technology, Anniversary ed, ed. W.E. Bijker, T. Hughes, and T. Pinch, xxxix–xliv. Cambridge, MA: MIT Press.Google Scholar
  7. Bormans, M., B. Maršálek, and D. Jancula. 2016. Controlling internal phosphorus loading in lakes by physical methods to reduce cyanobacterial blooms: A review. Aquatic Ecology 50: 407–422. doi: 10.1007/s10452-015-9564-x.
  8. Cairns Jr., J. 2006. Restoring damaged aquatic ecosystems. The Journal of Social, Political, and Economic Studies 31: 53–74.Google Scholar
  9. Cooke, D.G., E.B. Welch, S.A. Peterson, and S.A. Nichols. 2005. Restoration and management of lakes and reservoirs, 3rd ed. Boca Raton, FL: CRC Press.Google Scholar
  10. David, P.A. 1985. Clio and the economics of QWERTY. The American Economic Review 75: 332–337.Google Scholar
  11. Dizard, J.E. 2010. Uneasy relationships between ecology, history and restoration. In Restoration and history: The search for a usable environmental past, ed. M. Hall, 154–163. New York: Routledge.Google Scholar
  12. Dosi, G. 1982. Technological paradigms and technological trajectories. A suggested interpretation of the determinants and directions of technical change. Research Policy 11: 147–162.CrossRefGoogle Scholar
  13. Egan, D., E.E. Hjerpe, and J. Abrams. 2011. Why people matter in ecological restoration? In Human dimensions of ecological restoration: Integrating science, nature and culture, ed. D. Egan, E.E. Hjerpe, and J. Abrams, 21–39. Washington, DC: Island Press.CrossRefGoogle Scholar
  14. Geels, F.W. 2006. The hygienic transition from cesspools to sewer systems (1840–1930): The dynamics of regime transformation. Research Policy 35: 1069–1082. doi: 10.1016/j.respol.2006.06.001.CrossRefGoogle Scholar
  15. Geels, F.W., and J. Schot. 2007. Typology of sociotechnical transition pathways. Research Policy 36: 399–417. doi: 10.1016/j.respol.2007.01.003.CrossRefGoogle Scholar
  16. Gächter, R., and B. Müller. 2003. Why the phosphorus retention of lakes does not necessarily depend on the oxygen supply to their sediment surface. Limnology and Oceanography 48: 929–933. doi: 10.4319/lo.2003.48.2.0929.CrossRefGoogle Scholar
  17. Gächter, R., and B. Wehrli. 1998. Ten years of artificial mixing and oxygenation: No effect on the internal phosphorus loading of two eutrophic lakes. Environmental Science and Technology 32: 3659–3665. doi: 10.1021/es980418l.CrossRefGoogle Scholar
  18. Gobster, P.H., and R.B. Hull. 2000. Restoring nature: Perspectives from the social sciences and humanities. Washington, DC: Island Press.Google Scholar
  19. Gorman, H.S., and B. Mendelsohn. 2010. Where does nature end and culture begin? In The illusory boundary: Environment and technology in history, ed. M. Reuss, and S.H. Cutcliffe, 265–290. Charlottesville: University of Virginia Press.Google Scholar
  20. Harjula, H. 1971. Talvisesta happitilanteesta Tuusulanjärvessä sekä järven restauraatiotoimenpiteistä. Tuusulanjärven vesiensuojeluyhdistys, Helsinki (On the winterly oxygen conditions at Tuusulanjärvi and the restoration procedures at the lake, in Finnish).Google Scholar
  21. Hertta database. 2017. OIVA-Environment and Geographic Information Service. Finnish Environment Institute. http://www.syke.fi/avointieto.
  22. Higgs, E. 2003. Nature by design: People, natural process and ecological restoration. Cambridge: MIT Press.Google Scholar
  23. Horppila, J., P. Köngäs, J. Niemistö, and S. Hietanen. 2015. Oxygen flux and penetration depth in the sediments of aerated and non-aerated lake basins. International Review of Hydrobiology 100: 106–115. doi: 10.1002/iroh.201401781.CrossRefGoogle Scholar
  24. Horppila, J., H. Holmroos, J. Niemistö, I. Massa, N.A. Nygrén, P. Schönach, P. Tapio, and O. Tammeorg. 2017. Variations of internal phosphorus loading and water quality in a hypertrophic lake during 40 years of different management efforts. Ecological Engineering 103: 264–274. doi: 10.1016/j.ecoleng.2017.04.018.CrossRefGoogle Scholar
  25. Hupfer, M., and J. Lewandowski. 2008. Oxygen controls the phosphorus release from lake sediments—A long-lasting paradigm in limnology. A review paper. International Review of Hydrobiology 93: 415–432. doi: 10.1002/iroh.200711054.CrossRefGoogle Scholar
  26. Jordan, W.R., and G.M. Lubick. 2011. Making nature whole: A history of ecological restoration. Washington, DC: Island Press.CrossRefGoogle Scholar
  27. Järnefelt, H. 1958. Weiterer Beitrag zur Limnologie des Tuusulanjärvi. Acta Societatis pro fauna et flora Fennica, 74, 5, Societas pro fauna et flora Fennica, Helsinki (Another contribution on the limnology of Tuusulanjärvi, in German).Google Scholar
  28. Keski-Uudenmaan vesiensuojelun kuntainliitto. 1984. Tuusulanjärven kunnostussuunnitelma. Keski-Uudenmaan vesiensuojelun kuntainliitto, Vantaa (Restoration plan of Lake Tuusulanjärvi, in Finnish).Google Scholar
  29. Keto, A., A. Lehtinen, A. Mäkelä, and I. Sammalkorpi. 2004. Lake restoration. In Inland and coastal waters of Finland, ed. P. Eloranta, 93–104. Helsinki: University of Helsinki/Palmenia Publishing.Google Scholar
  30. Klein, H.K., and D.L. Kleinman. 2002. The social construction of technology: Structural considerations. Science, Technology & Human Values 27: 28–52. doi: 10.1177/016224390202700102.CrossRefGoogle Scholar
  31. Konttinen, R. 2013. Onnellista asua maalla: Tuusulanjärven taiteilijayhteisö. Siltala, Helsinki (Happy to live in the countryside: the artist community of Tuusulanjärvi, in Finnish).Google Scholar
  32. Krippendorff, K. 2013. Content analysis: An introduction to its methodology, 3rd ed. Thousand Oaks, CA: Sage.Google Scholar
  33. Kuha, J.K., A.H. Palomäki, J.T. Keskinen, and J.S. Karjalainen. 2016. Negligible effect of hypolimnetic oxygenation on the trophic state of Lake Jyväsjärvi, Finland. Limnologica—Ecology and Management of Inland Waters 58: 1–6. doi: 10.1016/j.limno.2016.02.001.CrossRefGoogle Scholar
  34. Kuhn, T.S. cop. 2012, orig. 1962. The structure of scientific revolutions, 4th ed. Chicago: The University of Chicago Press.Google Scholar
  35. KUVES. 2012. Tuusulanjärven kunnostusprojektin toimintasuunnitelma vuosille 20132017. KUVES, Kerava (Strategy for the restoration of Tuusulanjärvi, 2013–2017, in Finnish).Google Scholar
  36. Levander, K.M. 1901. Kevätretki Tuusulanjärvelle, Luonnon ystävä: yleistajuinen luonnontieteellinen aikakauslehti 5: 108–113 (Spring excursion at Tuusulanjärvi, in Finnish).Google Scholar
  37. Liboriussen, L., M. Søndergaard, E. Jeppesen, I. Thorsgaard, S. Grünfeld, T.S. Jakobsen, and K. Hansen. 2009. Effects of hypolimnetic oxygenation on water quality: Results from five Danish lakes. Hydrobiologia 625: 157–172.CrossRefGoogle Scholar
  38. Light, A. 2000. Ecological restoration and the culture of nature: A pragmatic perspective. In Restoring nature: Perspectives from the social sciences and humanities, ed. P.H. Gobster, and R.B. Hull, 49–70. Washington, DC: Island Press.Google Scholar
  39. Luodedata. Online data on the oxygen measurements at Tuusulanjärvi. www.luodedata.fi/halosenniemi. Retrieved 26 Nov 2016.
  40. Mallin, M.A., M.R. McIver, E.J. Wambach, and A.R. Robuck. 2016. Algal blooms, circulators, waterfowl, and eutrophic Greenfield Lake, North Carolina. Lake and Reservoir Management 32: 68–181. doi: 10.1080/10402381.2016.1146374.CrossRefGoogle Scholar
  41. Marttila. 2013. Tuusulanjärven vedenlaadun seuranta ja luokittelu, presentation at Tuusulanjärvi-seminar 23 May 2013 (Water quality monitoring and classification at Tuusulanjärvi, in Finnish). http://www.tuusulanjarvi.org/wp-content/uploads/2013/08/Seuranta.pdf. Retrieved 27 April 2017.
  42. Mercier, P. 1949. Aération partielle sous-lacustre d’un lac eutrophe. Verhandlungen Internationale Vereinigung für theoretische und angewandte Limnologie 10: 294–297 (Partial underwater aeration of a eutrophic lake, in French).Google Scholar
  43. Meyer, U., and C. Schubert. 2007. Integrating path dependency and path creation in a general understanding of path constitution. The role of agency and institutions in the stabilisation of technological innovations. Science, Technology & Innovation Studies 3: 23–44.Google Scholar
  44. Moosmann, L., R. Gächter, B. Müller, and A. Wüest. 2006. Is phosphorus retention in autochthonous lake sediments controlled by oxygen or phosphorus? Limnology and Oceanography 51: 763–771.CrossRefGoogle Scholar
  45. Niemistö, J., P. Köngäs, L. Härkönen, and J. Horppila. 2016. Hypolimnetic aeration intensifies phosphorus recycling and increases organic material sedimentation in a stratifying lake: Effects through increased temperature and turbulence. Boreal Environment Research 21: 571–587. http://www.borenv.net/BER/pdfs/preprints/Niemisto.pdf.
  46. Nokia. 1972a. Annual report. Nokia Communications Department. Excerpt received via email by the corresponding author from Mikko Hyvärinen, Records Manager of Nokia, 20 Jan 2016.Google Scholar
  47. Nokia. 1972b. Tuusulanjärven hapettaminen projektiosaston ilmastuslaitteistolla. Sufika 3/1972: 29 (Aeration of Tuusulanjärvi with equipment of the project department, in Finnish).Google Scholar
  48. Numminen, S., and R. Lemmelä. 1976. Tuusulanjärven ilmastuksen tuloksista. Vesitalous 17: 18–20 (Results of Tuusulanjärvi aeration, in Finnish).Google Scholar
  49. Nürnberg, G.K., B.D. LaZerte, and D.D. Olding. 2003. An artificially induced Planktothrix rubescens surface bloom in a small kettle lake in southern Ontario compared to blooms world-wide. Lake and Reservoir Management 19: 307–322. doi: 10.1080/07438140309353941.
  50. Nygrén, N. A. 2016. Järvien hoito ja kunnostus 2030. Tulevaisuusverstaiden tulokset. Tutu e-books 1/2016, Finland Futures Research Centre FFRC, Turku (Lake management and restoration in 2030, in Finnish).Google Scholar
  51. Peippo, L. 1963. Kokemuksia hapetuspumpun käytöstä. Suomen Kalastuslehti 70: 244–247 (Experiences in using aeration pumps, in Finnish).Google Scholar
  52. Project Tuusulanjärvi. 2015. Public notice, released 15 June 2015. http://www.tuusulanjarvi.org/wp-content/uploads/2012/01/Hapetin_2015.pdf. Retrieved 9 Sept 2016.
  53. Reunanen, S. 2005. Järvikunnostukset: intressiryhmien ja kunnostajien näkemykset sekä ympäristöhallinnon rooli. Uudenmaan ympäristökeskus, Helsinki (Lake restoration: perceptions of stakeholders and restorationists and the role of environmental administration, in Finnish).Google Scholar
  54. Saari, R., and S. Numminen. 1978. Tuusulanjärven ilmastus ja kalatalous. Kalamies 10/1978: 3–4 (Oxygenation of Tuusulanjärvi and fisheries, in Finnish).Google Scholar
  55. Seppänen, P. 1973. Järvien kunnostuksen limnologiset perusteet ja toteutusmahdollisuudet. Vesihallitus, Helsinki. https://helda.helsinki.fi/bitstream/handle/10138/156346/VH_julkaisuja_3.pdf?sequence=4. Retrieved 15 Oct 2016.
  56. Seppänen, P. 1976. Järvien kunnostus ihmisen aiheuttamien ympäristöhaittojen torjuntakeinoina II. Ympäristö ja terveys 7: 257–270 (Lake restoration as a way to combat anthropogenic environmental damages, in Finnish).Google Scholar
  57. Singleton, V.L., and J.C. Little. 2006. Designing hypolimnetic aeration and oxygenation systems: A review. Environmental Science & Technology 40: 7512–7520. doi: 10.1021/es060069s.CrossRefGoogle Scholar
  58. Tammeorg, O., T. Möls, J. Niemistö, H. Holmroos, and J. Horppila. 2017. The actual role of oxygen deficit in the linkage of the water quality and benthic phosphorus release: Potential implications for lake restoration. The Science of the Total Environment 599–600: 732–738. doi: 10.1016/j.scitotenv.2017.04.244.
  59. Tolonen, K., V. Ilmavirta, H. Hartikainen, and J. Suksi. 1990. Paleolimnological investigation of the eutrophication history of Lake Tuusulanjärvi, Southern Finland. Aqua Fennica 20: 27–41.Google Scholar
  60. Tuusulanjärvi Restoration Team. 2012a. Minutes of meeting 2 February 2012, (Kunnostustyöryhmä). http://www.tuusulanjarvi.org/wp-content/uploads/2013/08/TJ_Kr_112.pdf. Retrieved 9 Sept 2016.
  61. Tuusulanjärvi Restoration Team. 2012b. Minutes of meeting 23 May 2012 (Kunnostustyöryhmä). http://www.tuusulanjarvi.org/wp-content/uploads/2013/08/TJ_Kr_212.pdf. Retrieved 9 Sept 2016.
  62. Vesistöjen kunnostamistyöryhmä. 1977. Vesistöjen kunnostamistyöryhmän mietintö, KM 1977: 45. Maa- ja metsätalousministeriö, Helsinki (National committee on restoration of waters, in Finnish).Google Scholar
  63. Winiwarter, V., and M. Knoll. 2007. Umweltgeschichte: Eine Einführung. Köln: Böhlau Verlag.Google Scholar
  64. Zębek, E. 2014. Response of cyanobacteria to the fountain-based water aeration system in Jeziorak Mały urban lake. Limnological Review 14: 51–60. doi: 10.2478/limre-2014-0006.Google Scholar

Archival and other unpublished material

  1. The archival material of the Tuusulanjärvi Water Protection Association is stored in a poorly organized state at the City Archives of Järvenpää. The material there is compiled in folders that are inconsistently named and only indicatively reflect the respective folder content.Google Scholar
  2. Järvenpää city archive (JCA) Google Scholar
  3. Archival unit: TVSY (Tuusulanjärven vesiensuojeluyhdistys, i.e. TWPA Tuusulanjärvi Water Protection Association). The combination of TVSY + number/other label indicates the name of the folder in the archive.Google Scholar
  4. Brochure 1977, Tuusulanjärven tulevaisuus (The future of Lake Tuusulanjärvi). JCA/TVSY 7.Google Scholar
  5. Helsinki water district 1977, HVV lausunto hapetuksesta 77-78 (Statement on aeration 1977), JCA/TVSY 1. 1972- 81 II 10.1991.Google Scholar
  6. Järvenpää City Government 1970, Minutes of meeting 2 November 1970, Annex A. JCA/TVSY 6.Google Scholar
  7. Kainulainen, H. 1972, PM Tuusulanjärven entisöinti, 23 August 1972 (Pro memoria Renovation of Tuusulanjärvi. Kainulainen was an engineer of the company Nokia), JCA/TVSY1.Google Scholar
  8. Kangas, I. 1969, Tuusulanjärven tila ja ehdotus Tuusulanjärven parannustoimenpiteiksi 24.10.-3.11.1969 (The condition of Tuusulanjärvi and proposition of measures for improvement, unpublished PM), JCA/TVSY 5.Google Scholar
  9. TWPA, Aeration meeting 1 March 1972, meeting memorandum, JCA/TVSY 5.Google Scholar
  10. TWPA 1972, PM for the media, dated 27 November 1972, JCA/TVSY 6.Google Scholar
  11. Vesi-Eko memo 1982. Letter dated 17 Jun 1982 from Vesi-Eko CEO K.-Matti Lappalainen to The Board of Waters, including the memo “Järvien hoito MIXOX-hapetusmenetelmällä – ja millä hinnalla”, JCA/TVSY 5.Google Scholar
  12. VHVSY 1971, Alusveden juoksuttaminen Tuusulanjärvestä, statement dated 29 Sep 1971 (Hypolimnetic withdrawal from Tuusulanjärvi), JCA/TVSY 6.Google Scholar
  13. VHVSY 1978, Pro memoria, dated 13 June 1978, (concerns the water protection and management of Tuusulanjärvi), JCA/TVSY 5 1978-81.Google Scholar
  14. VHVSY 1979, Pro memoria”Näkökohtia Tuusulanjärven kunnostuksesta”, dated 18 April 1979 (Aspects on restoration of Tuusulanjärvi), JCA/TVSY II 12.Google Scholar
  15. VHVSY 1980, Plan of Action for the year 1980, JCA/TVSY II.11 1991.Google Scholar
  16. Keski-Uudenmaan vesiensuojelu kuntayhtymä (KUVES) archive, KUVES A Google Scholar
  17. TWPA Annual reports (Yearly), KUVES A/TVSY/.Google Scholar
  18. TWPA Plans of action (Yearly), KUVES A/TVSY/.Google Scholar
  19. Tuusula municipal archive Google Scholar
  20. Tuusula Municipal Government 1972, Minutes of meeting 30 May 1972, 637§.Google Scholar

Newspaper references

  1. Etelä-Suomen Sanomat (ESS), Southern Finnish regional newspaper Google Scholar
  2. ESS, 4 March 1972, Ilmaa happiköyhän Vesijärven alusveteen.Google Scholar
  3. ESS, 8 February 1972, Tuusulanjärven vesi pyritään hapettamaan.Google Scholar
  4. ESS, 4 Dec 1972, Tuusulanjärveen pumpataan happea.Google Scholar
  5. ESS, 20 January 1973, Lauha talvi helpottaa Vesijärven kalojen eloa.Google Scholar
  6. ESS, 25 July 1973, Vesivarojen kehittäminen kokousteemana Dipolissa.Google Scholar
  7. ESS, 2 Aug 1973, Likainen Vesijärvi tappoi jälleen tuhansia kaloja.Google Scholar
  8. ESS, 29 April 1978, Kunnostuksen tarpeessa 500 rehevöitynyttä järveä.Google Scholar
  9. ESS, 11 November 1978, Ilmastus toisi tehokasta apua Vesijärven hapenkatopulmiin.Google Scholar
  10. Maaseudun tulevaisuus 5 Dec 1972, Happea saastuneen järven pelastamiseksi.Google Scholar
  11. Helsingin Sanomat (HS), main daily newspaper with largest circulation Google Scholar
  12. HS, 16 January 1978, Liattu Tuusulanjärvi elvytetään.Google Scholar
  13. HS, 2 April 1980, Järvien hapetukseen uusi menetelmä.Google Scholar
  14. HS, 19 August 1990, Järven kosto: Suruttomasti saastutettu Tuusulanjärvi on pitkävihainen.Google Scholar
  15. HS, 7 May 1994, Järvenpään keskustaan halutaan marketteja ja yhteys järveen. Yli 80 ideapajalaista loi kaupungille uuden ydinkeskustan.Google Scholar
  16. HS, 21 May 1994, Pohjaan levitetty savikerros voi auttaa Tuusulanjärveä.Google Scholar
  17. HS, 26 November 1994, Metsät ja Tuusulanjärvi parhaita maisema-alueita.Google Scholar
  18. HS, 20 October 1995, Järvenpään keskusta muotoutuu vanhan suunnitelman mukaisesti. Kauppakeskus Tuusulanjärven rantamaisemaan.Google Scholar
  19. HS, 27 May 1996, Tuusulanjärveen valuu yhä lannoitteita. Harva haki EU:lta ympäristön erityistukea.Google Scholar
  20. HS, 25 April 1998, Tuusulanjärvi haukkoo happea ilmastuslaitteista. Kulttuurimaiseman ravinnekuormitus saadaan ehkä ensi kesänä lopultakin kuriin.Google Scholar
  21. HS, 11 July 2002, Tuusulanjärvellä taistellaan kuhakannan kohtalosta.Google Scholar
  22. HS, 18 February 2003, Kalakuolemat aiheuttavat järvissä keväällä terveysriskiGoogle Scholar
  23. HS, 13 Oct 2011, Tuusulanjärvestä Uudenmaan nimikko.Google Scholar
  24. Keski-Uusimaa (KeskU), most important local newspaper in the Tuusulanjärvi area Google Scholar
  25. KeskU, 20 Feb 1973 Tuusulanjärvi pelastuu? Hapetuskoetulokset rohkaisevia.Google Scholar
  26. KeskU, 1 March 1973 Tuomalan kalastuskunta tyytyväinen hapetukseen.Google Scholar
  27. KeskU, 8 March 1973 Vantaa vastustaa jyrkästi Järvenpään jätevesien laskua Keravanjokeen.Google Scholar
  28. KeskU, 12 March 1979, Toipuminen hidasta: Tuusulanjärven tekohengitys jatkuu vuosia.Google Scholar
  29. KeskU, 5 May 1979, Tuusulanjärvi Järvenpäälle ainutlaatuisen arvokas asia, Tuusulanjärven olemus on rehevä kaikin puolin.Google Scholar
  30. KeskU, 29 August 1979, Keinohapetus edelleen tärkeä elinehto Tuusulanjärvelle.Google Scholar
  31. KeskU, 18 November 1981, Aikainen jääpeite huonontanut järvien happitilannetta.Google Scholar

Copyright information

© Royal Swedish Academy of Sciences 2017

Authors and Affiliations

  1. 1.Department of Environmental SciencesUniversity of HelsinkiHelsinkiFinland
  2. 2.Finland Futures Research Centre (FFRC)University of TurkuTurkuFinland

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