GM crops to feed the world: PR or reality?
Dr Helen Wallace
27 May 2011
In 2009-10 Dr Helen Wallace served on the steering group of a Government sponsored ‘public dialogue’ on GM, which was led by the Food Standards Agency. She resigned from the process in May 2010 when it became clear that the 'dialogue' was intended as a PR exercise to present GM as an inevitable solution rather than an open question worthy of genuine public debate. Here she examines the claim that GM is necessary to feed the world, and argues it is a claim based on PR rather han any sense of reality.
In 2007, a major new public relations push began to convince European consumers to eat genetically modified (GM) crops by claiming they will be essential to feed the world. The argument that population growth and climate change will combine to create a “perfect storm” of threats to the global food supply was combined with claims that GM crops increase yields and will in future allow crops to survive in drought and saline conditions and make more efficient use of inputs, including nitrogen. Ministers told the Guardian that they were reluctant to publicly back the PR effort, but that GM would definitely come back to the UK. The GM industry claimed that concerns about climate change would reduce the chance of a public backlash and cited BASF’s field trials in Cambridge and Yorkshire of a blight-resistant potato as the first step towards a commercial GM crop in the UK.1
Monsanto’s attempts to position GM crops as a “pro-poor” technology are not new.2,3 However, the public relations strategy that began in the UK, and more broadly in Europe, in 2007 was not led by spokespeople from the six major agricultural biotech companies (Monsanto, Dow, DuPont, BASF, Syngenta and Bayer) but by supposedly independent scientists. They included representatives of the small circle of influential research institutions (including the UK’s John Innes Centre) involved in setting up the EU’s Framework 7 (FP7) research technology platform “Plants for the Future”, jointly with the biotech industry association EuropaBio and the European Plant Science Organisation (EPSO).4 These researchers are not entirely disinterested observers: the agricultural biotech industry has claimed that it requires an investment of more than 45 billion Euros in R&D under the Plants for the Future programme over the next ten years, of which an estimated 7.5 billion Euros ($10 billion) would be public money – equivalent to the total global value of the existing industry.5 Other researchers involved in promoting GM crops have founded biotech companies or hold key patents that they hope to be able to commercialise via licensing agreements with the major companies.6
By 2008, media reports favourable to GM crops had begun to outnumber those that were critical of the technology. However, most of these reports rested on speculative or misleading claims. For example, former Chief Scientist Professor Sir David King told the BBC Today Programme in 2007 that crop trials around Lake Victoria in Kenya had shown how useful GM farming could be in feeding the Third World. In fact, this “push-pull” project uses agro-ecological farming methods, not GM crops.7
As part of the public relations push to convince the public to support GM, frequent reference has been made to drought-tolerant, salt-tolerant and nitrogen-fixing GM crops. Salt-tolerant and nitrogen-fixing crops were first promised by the US Office of Technology Assessment in its 1981 report on genetic engineering of micro-organisms, plants and animals.8 Thirty years and billions of dollars later, no such crops exist. In 2010, the experts involved in the UK Foresight ‘Global Food and Farming Futures’ project listed predicted development timescales of a further 5 to 10 years for GM drought-tolerance, 10 to 20 years for salt-tolerance and increased nitrogen use efficiency, and more than 20 years for nitrogen fixation.9 More sceptical scientists have questioned whether such complex traits can really be engineered into a seed, even over these long timescales: multiple genes and gene-environment interactions are involved and engineering even multiple genetic changes into a plant is unlikely to deliver on such promises.10,11,12,13 Conventional breeding has been much more successful in improving yields in high salinity environments, at much lower cost.14
Promoting GM approaches to these complex traits has more to do with business models than with the reality of farming. Both DuPont and Syngenta have recently announced the successful development of new conventionally bred drought-tolerant maize varieties.15 However, Syngenta has already stated that it will only market its new seed with two existing GM traits (herbicide tolerance and pesticide resistance) also included in the seed, thus allowing it to claim patent protection and market the crop with its own-brand herbicide.16 Conventionally bred varieties of blight-resistant potatoes are also available17 and there are plenty of other non-GM successes, including drought-tolerant non-GM maize which has performed well in studies in Africa.18 Research into crop rotation, intercropping and other low-input methods also has potential to substantially benefit smallholder farmers in Africa and elsewhere.19,20,21,22
Commercially grown GM crops are still restricted to the two main traits of herbicide tolerance and insect resistance (Bt crops) in four main staple crops: soy, maize, oil seed rape and cotton. Many ‘stacked traits’ are in the pipeline: combining insect resistance with tolerance to multiple herbicides. Downsides for farmers growing these crops include the spread of herbicide-resistant weeds in North and South America. 23,24,25 Poor farmers adopting similar systems would be at risk of being locked into a “poverty trap” where seed price hikes and the need for increasing amounts of chemicals could drive them into bankruptcy. Insect resistant crops are also unsustainable: bollworms resistant to Bt cotton (already a problem in the USA26) were reported last year in India.27 In China, initial economic benefits in terms of savings in insecticide use with Bt crops were lost as secondary pests emerged, requiring additional insecticide use.28
For non-GM farmers key issues are cross-contamination and liability.29 The costs of segregating GM crops fall on conventional and organic farmers, rather than on those choosing to grow or import GM crops, and thus limit choice for non-GM growers by damaging their markets.30,31,32,33,34 There have been many GM contamination incidents around the world.35 For example, in 2009 Canada’s entire $320-million flax seed industry was threatened when it was found to be contaminated with an experimental GM variety called Triffid.36 In the US, the Public Patent Foundation recently filed a lawsuit on behalf of sixty family farmers, seed businesses and organic agricultural organisations concerned that their non-GM seeds and crops could be contaminated through cross-pollination, and that Monsanto would subsequently file suit for patent infringement.37 The prevention of seed saving by patenting and licensing agreements is another major issue for poorer farmers.38
The argument that GM crops are needed to feed the world misrepresents hunger as being essentially an issue of insufficient agricultural production, rather than of poverty and unequal distribution of resources.39 An estimated 40% of US GM maize production now goes into biofuels and perhaps as much as 90% of remaining GM production (i.e. not including cotton and biofuels) to animal feed (although reliable figures are difficult to come by).The diversion of potential food-growing land to produce industrial-scale biofuels and animal feed is part of the problem, not the solution, to global hunger.40 Based on grain consumption figures calculated by the Food and Agriculture Policy Research Institute (FAPRI),41 Monsanto argues that production of grain for animal feed must increase by 50 million tonnes a year by 2017/18 to meet the expected increased demand for meat, and by 60 million tonnes a year to meet biofuels production targets, requiring more investment in intensive agriculture, including GM crops.42 At the same time as claiming GM crops are needed to help feed the world, Monsanto and other companies have been actively lobbying for government subsidies for industrial-scale biofuels.43
Repeated claims about higher yields from existing GM crops are also highly misleading. Overall, studies do not find statistically significant increases in yield for most GM crops, with decreases in yields some studies, in particular for Bt soya.44 Bt maize and cotton have shown yield increases in some situations (when there is a severe pest outbreak) but not others.45 The methodology used in yield studies has been disputed by some researchers, because it fails to capture the dynamic nature of agricultural systems, the degree of ecosystem disruption, and the institutional conditions governing the use of pest control inputs.46 Yields from more recent GM products, including Monsanto’s ‘Round Up Ready 2’ soybeans and its ‘Smartstax’ maize have reportedly been disappointing.47,48,49
As part of the push to bring GM crops back into Britain, the former Government sponsored a public dialogue, led by the Food Standards Agency. By the time I resigned from the Steering Group for this process in May 2010, it had become clear that it was intended to present GM as an inevitable part of the solution to feeding a growing population, rather than open up this question for genuine public debate.50 Ipsos Mori was shortlisted to run this dialogue: the polling company declared it had been working with a “multi-national Agro-chemical and seed company” and its advertising agency since 2009 “to develop concepts which link agribusiness with important global issues (such as climate change, water scarcity, deforestation etc) and position the company as a positive force”. Following a second resignation, by the Steering group’s deputy chair, the process was abandoned by the new Coalition Government: its policy is yet to be decided.
In general, consumers remain sceptical about eating GM foods. In treating people as “irrational” and “anti-science”, the advocates of GM crops often ignore the underlying reasons behind much of this unease. The Public Acceptance of Agricultural Biotechnologies in Europe project (PABE)51, conducted using focus groups back in 1998/99 found that people’s views were largely shaped by institutional behaviour, not by public relations exercises. Key questions revealed by the study were:
- Why do we need GMOs?
- Who will benefit from their use?
- Who decided that they should be developed and how?
- Why are we not given an effective choice about whether or not to buy these products?
- Have the potential long-term and irreversible consequences been evaluated, and by whom?
- Do regulatory authorities have sufficient powers to effectively regulate large companies who wish to develop these products?
- Can controls imposed by regulatory authorities be applied effectively?
- Who will be accountable in cases of unforeseen harm?
Many of these questions still remain unanswered.
Much emphasis has also been placed on the idea that a new generation of GM crops will provide benefits for rich consumers in the form of improved nutrition and the means to tackle “hidden hunger”, such as deficiencies in vitamin A and iron in poorer countries. However, nutrient-enhanced crops are costly to develop and a poor way to deliver these claimed benefits compared to diversifying diets.52 Even supposedly beneficial nutrients such as vitamins and minerals can be harmful to some people (people who are not nutrient deficient) and safe upper levels of most nutrients are poorly defined.53 For example, beta carotene (the main ingredient in GM Golden Rice) increases cancer risk in high doses in smokers and asbestos workers.54 Plants genetically-modified to increase the uptake of iron and zinc can also exacerbate soil depletion and concentrate harmful toxic metals from contaminated soils.55 In addition, such approaches can act as a distraction from the underlying causes of unhealthy diets. For example, Monsanto and Solae are collaborating on a project to produce GM soybeans high in omega-3 fatty acids. This is an ineffective technical fix to a problem which is caused by Monsanto’s core business in the first place: grain-fed meat is much less healthy than pasture-fed meat or game in its fatty acid content.56,57 The ratio of omega-6 fatty acids to omega-3 fatty acids has increased substantially in modern compared to traditional diets, partly due to increased use of sunflower and other oils; and partly due to intensive farming of cattle fed on grains.58
Top down decision making
The Foresight report on Food and Farming Futures59 promotes GM technology as only one “tool in the box” to tackle global hunger and recognises that major issues such as land and water use and food waste also need to be considered. However, it still neglects the downsides of GM crops and makes a blanket global statement about restricting the expansion of agriculture onto new land, without considering highly variable local circumstances and the politics and economics of how decisions will be made about land use in practice on the ground. In endorsing the Royal Society’s concept of “sustainable intensification”60 it adopts a utilitarian approach in which scientific institutions (such as the Royal Society itself) are capable of weighing up and making decisions about what is best for farmers and consumers, and then somehow promoting these solutions worldwide. This contrasts with a rights-based approach to considering the ethical implications of sustainable intensification and more ‘bottom-up’ approaches to decision-making.61,62,63
Within Europe, a shift to more local decision-making could help strengthen and expand local food systems and organic agriculture, provided policy-makers are aware of the importance of the sector.64 Internationally, much will depend on whether international development support is used to back big multinational companies or to support bottom-up approaches driven by smallholder farmers on the ground. Seventy per cent of the world’s poor people, including the poorest of the poor, and seventy five per cent of the world’s malnourished live in rural areas, where most of them are involved in agriculture. They often live in complex, diverse and risk-prone settings, with inherent seasonal instability.65 In such circumstances, farmers may prefer local farmer varieties for sowing and especially for eating, avoiding GM varieties.66
Monsanto has just begun another push to sell more seeds in developing countries, backed by the money and muscle of both the US Government and the Gates Foundation.67,68,69,70 At the same time, the benefits of agro-ecological agricultural systems in the battle against hunger are being increasingly acknowledged.71 It matters more than ever whether the claims made for GM crops are PR or reality. The livelihoods of illions of small-scale subsistence farmers are at stake.
Dr Helen Wallace is the Director of GeneWatch UK a not-for-profit group that monitors developments in genetic technologies from a public interest, human rights, environmental protection and animal welfare perspective. You can contact the author with comments by email: firstname.lastname@example.org
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1 Jha A (2007) Return of GM crops: Ministers back moves to grow crops in UK. The Guardian. 17th September 2007. http://www.guardian.co.uk/science/2007/sep/17/gmcrops.politicalnews1
2 Glover, D (2008) Made by Monsanto: the corporate shaping of GM crops as a technology for the poor. STEPS Working Paper 11. STEPS Centre, Brighton. http://www.steps-centre.org/PDFs/GM%20Crops%20web%20final_small.pdf
3 Glover D (2009) Undying promise: agricultural biotechnology’s pro-poor narrative, ten years on. STEPS Centre Working Paper 15.
4 EC(2004) Plants for the Future: 2025 a European Vision for plant genomics and biotechnology. EUR21359EN. ec.europa.eu/research/biosociety/pdf/plant_genomics.pdf
5 Wallace, HM (2010) Bioscience for Life? Who decides what research is done in health and agriculture? GeneWatch UK. April 2010. http://www.genewatch.org/uploads/f03c6d66a9b354535738483c1c3d49e4/Bioscience_for_life.pdf
6 Scientist leading GM crop test defends links to US biotech giant Monsanto. The Observer. 18th July 2010. http://www.guardian.co.uk/environment/2010/jul/18/gm-scientist-defends-monsanto-links/print
7 Poulter S (2007) Scientist who claimed GM crops could solve Third World hunger admits he got it wrong. Daily Mail, 18th December 2007. http://www.dailymail.co.uk/sciencetech/article-503339/Scientist-claimed-GM-crops-solve-Third-World-hunger-admits-got-wrong.html
8 US Office of Technology Assessment (1981) Impacts of applied genetics: Micro-organisms, plants and animals. April 1981. http://www.fas.org/ota/reports/8115.pdf
9 Godfray HCJ, Beddington JR, Crute IR, Haddad L, Lawrence D, Muir JF, Pretty J, Robinson S, Thomas SM, Toulmin C (2010) Food security: the challenge of feeding 9 billion people. Science. www.sciencexpress.org / 28 January 2010 / Page 1 / 10.1126/science.1185383
10 Flowers TJ(2004) Improving crop salt tolerance. Journal of Experimental Botany, 55(396), 307-319.
11 Tuberosa R, Salvi S (2006) Genomics-based approaches to improve drought tolerance of crops . Trends in Plant Science, 11(8), 405-412.
12 Cattivelli L, Rizza F, Badeck F-W, Mazzucotelli E, Mastrangelo AMM, Francia E, Marè C, Tondelli A, Stanca AM (2008) Drought tolerance improvement in crop plants: An integrated view from breeding to genomics. Field Crops Research, 105(1-2), 1-14.
13 Sinclair TR, Purcell LP (2005) Is a physiological perspective relevant in a ‘genocentric’ age? Journal of Experimental Botany, 56(421), 2777-2782.
14 Ashraf M, Akram NA (2009) Improving salinity tolerance of plants through conventional breeding and genetic engineering: an analytical comparison. Biotechnology Advances, 27, 744-752.
15 DuPont Wades Into Drought-Tolerant Corn. Wall Street Journal. 5th January 2011. http://online.wsj.com/article/SB10001424052748704405704576063961961160744.html
16 Drought-tough corn seed races to the finish line. News Observer. 21st December 2010. http://www.newsobserver.com/2010/12/21/873577/drought-tough-corn-seed-races.html#ixzz19bnyr2KL
18 Drought tolerant maize to hugely benefit Africa: study. Reuters. 25th August 2010. http://www.reuters.com/article/2010/08/26/us-maize-africa-idUSTRE67P01V20100826
19 Fening JO, Gyapong TA, Ababio F, Gaisie E (2006) Intercropping maize with planted fallows on smallholder farms in Ghana. Tropical Science, 45(4), 155-158.
20 Chamango AMZ (2001) Improving grain yield of smallholder cropping systems: a farmer participatory research (FPR) approach with legumes for soil fertility improvement in central Malawi. Seventh Eastern and Southern Africa Regional Maize Conference, 11th-12th February, 2001. pp.413-417.
21 Bertomeu M (undated) Small-scale farm forestry: an adoptable option for smallholder farmers in the Philippines? http://www.worldagroforestry.org/downloads/publications/PDFs/bc05136.doc
22 Jeranyama P, Waddington SR, Hesterman OB, Harwood RR (2007) Nitrogen effects on maize yield following groundnut in rotation on smallholder farms in sub-humid Zimbabwe. African Journal of Biotechnology, 6 (13), 1503-1508.
23 Sandermann H (2006) Plant biotechnology: ecological case studies on herbicide resistance. Trends in Plant Science, 11(7), 324-328.
24 Farmers cope with Roundup-resistant weeds. New York Times. 3rd May 2010. http://www.nytimes.com/2010/05/04/business/energy-environment/04weed.html?_r=1
25 Binimelis, R, Pengue, W, Monterroso, I (2009) ‘‘Transgenic treadmill”: Responses to the emergence and spread of glyphosate-resistant johnsongrass in Argentina. Geoforum (2009), doi:10.1016/j.geoforum.2009.03.009. http://icta.uab.cat/99_recursos/1241769532578.pdf
26 Tabashnik BE, Gassman AJ, Crowder DW, Carriére Y (2008) Insect resistance to Bt crops: evidence versus theory. Nature Biotechnology, 26, 199 – 202.
27 Worms eat into GM crop myth - Insects expected to drop dead thrive on cotton plants. The Telegraph India. 12th December 2010. http://www.telegraphindia.com/1101212/jsp/frontpage/story_13290179.jsp#top
28 Wang S., Just DR & Pinstrup-Andersen P (2006) Tarnishing Silver bullets: Bt technology adoption, bounded rationality and the outbreak of secondary pest infestations in China. Paper presented at the American Agricultural Economics Association Meeting, Long Beach CA, July 22-26, 2006. http://www.grain.org/research_files/SWang_tarnished.pdf
29 Rodgers C (2007) Coexistence or conflict? A European perspective on GMOs and the problem of liability. Bulletin of Science, Technology and Society, 27(3), 233-250.
30 Johnson DD, Lin W, Vocke G (2005) Economic and welfare impacts of commercializing an herbicide tolerant, biotech wheat. Food Policy, 30, 162-184.
31 Bock A-K ,Lheureux, Libeau-Dulos M, Nilsagård H & Rodriguez-Cerezo E (2002) Scenarios for co-existence of genetically modified, conventional and organic crops in European agriculture. IPTS - JRC Report EUR 20394EN ftp://ftp.jrc.es/pub/EURdoc/eur20394en.pdf.
32 Belcher K, Nolan J, Phillips PWB (2005) Genetically modified crops and agricultural landscapes: spatial patterns of contamination. Ecological Economics, 53(3), 387-401.
33 Munro A (2008) The spatial impact of genetically modified crops, Ecological Economics, 67(4), 658-666.
34 Universitat Autonoma de Barcelona (2008) An Impossible Coexistence: Transgenic And Organic Agriculture.” ScienceDaily 2 July 2008. http://www.sciencedaily.com- /releases/2008/06/080630102731.htm
36 Triffid seed threatens flax industry. CBC News. 20th January 2010. http://www.cbc.ca/canada/manitoba/story/2010/01/20/mb-flax-triffid-manitoba.html
37 Small Asheville seed company takes on agri-giant. Citizen Times. 3rd April 2011. http://www.citizen-times.com/article/20110403/NEWS/304030048/Small-seed-firm-takes-agri-giant?odyssey=tab|topnews|text|Frontpage
38 Oguamanam C (2007) Tension on the farm fields: The death of traditional agriculture? Bulletin of Science, Technology & Society, 27(4), 260-273.
39 Rosset PM (2005) Transgenic crops to address Third World hunger? A critical analysis. Bulletin of Science, Technology & Society, 25, 306-313.
40 FAO(2008) Soaring food prices: facts, perspectives, impacts and actions required. High-level conference on world food security: the challenges of climate change and bioenergy. Rome, 3 - 5 June 2008. http://www.fao.org/fileadmin/user_upload/foodclimate/HLCdocs/HLC08-inf-1-E.pdf
42 Edgerton MD (2009) Increasing crop productivity to meet global needs for food and fuel. Plant Physiology, 149, 7-13.
43 Biggies from agribusiness join new biofuels lobbying group. 25th July 2008. http://www.livemint.com/2008/07/25130050/Biggies-from-agribusiness-join.html
44 Gomez-Barbero M, Rodriguez-Cerezo E (2006) Economic impact of dominant GM crops worldwide: a review. Institute for Prospective Technological Studies, European Commission Joint Research Centre. EUR 22547 EN. http://184.108.40.206/attachments/Econ_Impact_GM_world.pdf
45 Gomez-Barbero M, Berbel J, Rodriguez-Cerezo E(2008) Bt corn in Spain – the performance of the EU’s first GM crop. Nature Biotechnology, 26(4), 384-386.
46 Pemsl D, Waibel H, Gutierrez AP (2006) The economics of biotechnology under ecosystem distruption. Contributed paper prepared for presentation at the International Association of Agricultural Economists Conference Gold Coast, Australia, August 12-18, 2006. http://ageconsearch.umn.edu/bitstream/25335/1/cp060906.pdf
47 Monsanto shares slip as analyst flags seed yields. Bloomberg Business Week. 28th September 2010. http://www.businessweek.com/ap/financialnews/D9IH32FO0.htm
48 Monsanto rises to China challenge. Financial Times. 6th March 2011. http://www.ft.com/cms/s/0/daf48e08-4824-11e0-b323-00144feab49a.html#axzz1HzFUm7NH
49 Zobiole, LHS, Kremer, RJ, Oliveira, RS Jr, Constantin, J (2010) Glyphosate affects photosyntheses in first and second generation of glyphosate-resistant soybeans. Plant Soil, 336, 251-265.
50 Resignation letter on: http://www.genewatch.org/uploads/f03c6d66a9b354535738483c1c3d49e4/resignation.doc
51 Marris C (2001) Public views on GMOs: deconstructing the myths. EMBO Reports, 2(7), 545-548.
52 Jacobs Jr DR, Murtaugh MA (2000) It’s more than an apple a day: an appropriately processed plant-centred dietary pattern may be good for your health. American Journal of Nutrition, 72, 899-900.
53 Coppens P, Fernandes da Silva M, Pettman S (2006) European regulations on nutraceuticals, dietary supplements and functional foods: A framework based on safety. Toxicology, 221, 59-74.
54 Watkins SM, Hammock BD, Newman JW, German JB (2001) Individual metabolism should guide agriculture toward foods for improved health and nutrition. American Journal of Clinical Nutrition, 74, 283-286.
55 Gómez-Galera, S, Rojas, E, Sudhakar, D, Zhu, C, Pelacho, AM, Capell, T, Christou, P (2010) Critical evaluation of strategies for mineral biofortification of staple food crops. Transgenic Research, 19, 165-180.
56 Dhiman, TR, Anand, GR, Satter, LD, Pariza, MW (1999) Conjugated linoleic acid content of milk from cows fed different diets. Journal of Dairy Science, 82, 2146-2156.
57 Rule DC, Broughton, KS, Shellito, SM, Maiorano (2002) Comparison of muscle fatty acid profiles and cholesterol concentrations of bison, beef cattle, elk, and chicken. Journal of Animal Science, 80, 1202-1211.
58 Fairweather-Tait SJ (2003) Human nutrition and food research: opportunities and challenges in the post-genomic era.Philosophical Transactions of the Royal Society London B, 358, 1709-1727.
59 Global Food and Farming Futures: Final Report. January 2011. http://www.bis.gov.uk/foresight/our-work/projects/current-projects/global-food-and-farming-futures/reports-and-publications
60 Reaping the benefits: Science and the sustainable intensification of global agriculture. Royal Society. October 2009. http://royalsociety.org/Reapingthebenefits/
61 The ethics of sustainable agricultural intensification. FAO Ethics Series. Rome, 2004. ISBN 92-5-105067-8
62 UN(2009) Seed policies and the right to food: enhancing agrobiodiversity and encouraging innovation. Report of the Special Rapporteur on the right to food. 23rd July 2009.
63 IAASTD (2008) International Assessment of Agricultural Knowledge, Science and Technology for Development (IAASTD) global summary for decision makers. http://www.agassessment.org/docs/Global_SDM_060608_English.pdf
64 Local Food Systems in Europe: Case studies from five countries and what they imply for policy and practice. Final Report. 2010. Facilitating Alternative Agro-Food Networks. http://www.faanweb.eu/sites/faanweb.eu/files/FAAN_Booklet_PRINT.pdf
65 Thompson, J., Millstone, E., Scoones, I., Ely, A., Marshall, F., Shah, E., Stagl, S. (2007) Agri-food System Dynamics: pathways to sustainability in an era of uncertainty. STEPS Working Paper 4, Brighton: STEPS Centre. http://www.steps-centre.org/PDFs/Final_steps_agriculture.pdf
66 Soleri D, Cleveland DA, Glasgow G, Sweeney SH, Cuevas FA, Fuentes MR, Ríos HL (2008) Testing assumptions underlying economic research on transgenic food crops for Third World farmers: Evidence from Cuba, Guatemala and Mexico. Ecological Economics, 67, 667-682.
67 Biotech groups see modified crop boost. The Financial Times. 6th March 2011. http://www.ft.com/cms/s/0/c2a9fcb8-481d-11e0-b323-00144feab49a.html#axzz1IgMjjCDI
68 US pushed for passing of Biosafety Act. Daily Nation. 30th March 2011. http://www.nation.co.ke/News/US+pushed+for+passing+of+Biosafety+Act+/-/1056/1124328/-/r60qp1z/-/
69 Dark side of giving: The rise of philanthro-capitalism. The Economic Times. http://articles.economictimes.indiatimes.com/2011-03-25/news/29188722_1_paul-kagame-rwanda-agra
70 ANALYSIS-More Africa countries seen growing GM crops. Reuters. 31st March 2011. http://af.reuters.com/article/tanzaniaNews/idAFLDE72T0HR20110331?sp=true
71 United Nations Special Rapporteur on the Right to Food (2011). Agroecology and the right to food. March 2011. http://www.srfood.org/index.php/en/component/content/article/1174-report-agroecology-and-the-right-to-food