African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6711

Full Length Research Paper

Perceived impacts of climate change among rural farmers in Imo State, Nigeria

Ozor, N
  • Ozor, N
  • African Technology Policy Studies Network (ATPS), 3rd Floor, The Chancery, Valley Road, P. O. Box 10081-00100; Nairobi, Kenya.
  • Google Scholar
Umunakwe, P. C.
  • Umunakwe, P. C.
  • Department of Agricultural Extension, Federal University of Technology, P. M. B. 1526, Owerri, Imo State, Nigeria.
  • Google Scholar
Ani, A. O.
  • Ani, A. O.
  • Department of Agricultural Extension, Federal University of Technology, P. M. B. 1526, Owerri, Imo State, Nigeria.
  • Google Scholar
Nnadi, F. N.
  • Nnadi, F. N.
  • Department of Agricultural Extension, Federal University of Technology, P. M. B. 1526, Owerri, Imo State, Nigeria.
  • Google Scholar


  •  Received: 16 February 2015
  •  Accepted: 01 April 2015
  •  Published: 02 April 2015

 ABSTRACT

The study analyzed the impacts of climate change among rural farmers in Imo State, Nigeria. Specifically, it ascertained the socioeconomic characteristics of the farmers, their level of awareness of climate change, the perceived causes of climate change and the perceived impacts of climate change. Multistage sampling technique was used to select a sample of 100 farmers for the study. Data were collected using structured questionnaire. The data were analyzed using frequency counts, percentages, mean score and bar charts. Results showed that a greater proportion (40.6%) of the respondents knew a little about climate change. Also, it showed that gas flaring (M = 2.07, S.D = 1.94), violation of local customs (M = 2.01, S.D = 1.83) and natural phenomenon (M = 2.00, S.D = 1.83) were perceived as causes of climate change. The result further showed that declining crop yields (49.0%), declining soil fertility (17.0%), drought events (17.0%) and increased heat wave (15.0%) were the perceived impacts of climate change on agriculture in the study area. It was recommended that relevant, timely and up-to-date information on climate change should be provided to the farmers to boost their adaptive capacity to climate change.

 

Key words: Climate change, impacts, rural farmers, Imo State, Nigeria.


 INTRODUCTION

Climate change is one of the most topical environmental issues of this century. Though, it is not possible to predict precise future climate conditions, but the scientific consensus is that global land and sea temperatures are warming under the influence of greenhouse gases and will continue to warm regardless of human interventions for at least the next two decades (Intergovernmental Panel Climate Change, IPCC, 2007).
 
Climate change refers to   any change in climate   overtime, whether due to natural variability or as a result of human activity (IPCC, 2007). It could also be defined as any significant change in measures of climate lasting for an extended period. This include changes in average weather conditions on earth, such as change in average global temperature, as well as changes in how frequently regions experience heat, droughts, storms, floods and other extreme events (Climate Change Information   Resource,  CCIR,   2004).  According  to  the  Ministry   of Environment of the Federal Republic of Nigeria, MOE FRN (2003) climate change has become a global issue in recent times, manifesting in different climate parameters including cloud cover, precipitation, temperature ranges, sea level and vapour pressure.
 
The main causes of climate change have been attributed to anthropogenic (human-induced) activities (IPCC, 2007). Human activities such as the burning of fossil fuels and changes in land use like deforestation release greenhouse gases (GHGs) into the atmosphere which increases the already existing concentration of these gases. According to the South African Confederation of Agricultural Unions, SACAU (2009), the main GHGs are carbon dioxide, methane and nitrous oxide which account for 80, 14 and 6% of the total GHG emission, respectively.
 
Climate change is projected to have numerous and varied impacts on the environment and human lives. However, such impacts depend on the extent of adaptation, rate of temperature change and socio-economic conditions (IPCC, 2007). This implies that some sectors, systems and regions will more likely be affected than others but the impact will vary depending on system’s sensitivity and adaptive capacity. Developing countries such as in Africa despite their least contributions to GHG emissions are increasingly expected to face climate-related threats. This according to Oli and Alec (2009) is as a result of their dependence on climate sensitive sectors (rain-fed agriculture, fishery), poverty and its history of resource, political and ethnic conflicts.
 
Such impacts include changes in wind patterns and precipitation, contraction of snow and sea ice, very likely increases in frequency of hot extremes, heat waves and heavy precipitation increases in high latitudes and likely decreases in most subtropical land regions (IPCC, 2007). These impacts are projected to affect agriculture, water availability, coastal areas and human health, thus affecting all natural and man-made systems to an extent (SACAU, 2009).
 
According to Ekong (2003), agriculture is the most dominant occupation in the rural areas. It constitutes the backbone of most African economies, making the largest contribution to GDP and the biggest source of foreign exchange, accounting for about 40% of the continent’s foreign exchange earnings (Eva, 2009). However, it is considered as the sector most threatened by climate change in sub-Saharan Africa where there is low capacity to adapt (Shah et al., 2008). Eva (2009) maintains that climate change will exacerbate the existing challenges already facing the sector such as urbanization and industrialization, population increase, degradation of resources and insufficient public spending for rural infrastructure and services.
 
As posited by Ziervogel et al. (2006), impacts of climate change on agriculture include limited supply of rainfall and drying out of water sources, scarcity of grazing lands, shortage of dairy  products,  and  loss  of  wild  plants  for gathering, migration of grazers, poor harvest and livestock losses among others. These problems would aggravate the stresses already associated with subsistence production, such as isolated location, small farm size, limited resources, informal land tenure etc (IPCC, 2007). These will make small-scale farmers in the rural areas particularly vulnerable to the risks of climate change.
 
It is important to identify the various impacts of climate change in vulnerable communities, which will enable the determination of the extent of risks posed by the changing climate on their dominant occupation (that is, agriculture) as well as enhance the development, streamlining and up scaling of adaptation strategies. This is further necessitated by the fact that impacts of climate change are location-specific and these have to be determined in order to develop comprehensive and suitable adaptation strategies which will capture vulnerable communities in developing countries. It is against this backdrop that the following research questions are being asked: what are the perceived causes of climate change and what are the perceived impacts of climate change in the study area?
 
Purpose and objectives
 
The overall purpose of the study is to identify the perceived impacts of climate change among rural farmers in Imo State, Nigeria. Specifically, the study sought to:
 
1. Determine the socio-economic characteristics of the farmers;
2. Ascertain the awareness of climate among the farmers;
3. Identify perceived causes of climate change in the study area; and
4. Identify perceived impacts of climate change in the area. 


 METHODOLOGY

The study was carried out in Imo State, which is among the five states in the Southeast geopolitical zone of Nigeria. It lies within latitude 4° 45, N and 7° 15, N and longitude 6° 50, E and 7° 25, E and covers an area of about 5100 km2. It is divided into three political zones namely Owerri, Okigwe and Orlu and comprises 27 LGA. The population of the state stands at 4.8 million people (Federal Republic of Nigeria Official Gazette, 2007). Rainfall distribution is bi-modal with peaks in August and September. Variation in annual rainfall is between 1900 and 2200 mm. Temperature is uniform in the state with mean annual temperature of about 20°C. The annual relative humidity is 75% and the state lies within the rainforest agro-ecological zone. The major economic activity of the people is farming which confirms the predominance of rural communities in the state. Major crops grown include maize, cassava, yam and cocoyam while major livestock kept are goats, sheep and poultry (Umunakwe, 2011). 
 
All farmers in the state constituted the population for the study. Multi-stage sampling technique was used to select the sample.  The first stage comprised the purposive selection of one LGA from each of the three political zones in Imo state based on peculiar vulnerability factors which include flood, erosion, oil exploration and other natural disasters. The second stage comprised the purposive selection of one autonomous community from each of the three LGAs based on the vulnerability factors above. The third stage involved the purposive selection of three villages from each of the three autonomous communities based on vulnerability factors mentioned above. The fourth stage comprised the purposive selection of 12 farmers from each of the nine villages. Overall, 108 farmers were used for the study. Data for this study were collected using a structured questionnaire and interview schedule and were validated using face and content validity.
 
To ascertain the level of awareness of climate change, respondents were asked to indicate their knowledge of climate change and their responses were measured on a nominal scale of Know a lot = 4, know = 3, know a little = 2 and don’t know = 1. The percentages of the observations on the scales were determined. To ascertain the perceived causes of climate change, a list of possible causes of climate change obtained from literature and field observation were provided and the respondents’ perception were measured on a 5 point likert type scale. These are, To a Great Extent = 4, To Some Extent = 3, To a Little Extent = 2, To a Very Little Extent = 1 and To No Extent = 0. The mean score was determined by adding up all the values of the scale to obtain 10. Then, it was divided by the number of values, that is, (10/5) to obtain 2. Items with M ≥ 2 were regarded as perceived causes of climate change in the study area. The perceived effects of climate change were ascertained by providing a list of possible effects of climate change obtained from literature and personal observations and respondents were asked to indicate the ones they perceive as effects. Data obtained were analyzed using percentage distribution, mean statistics and bar charts.


 RESULTS AND DISCUSSION

Age
 
Data in Table 1 show that majority (61.5%) of the respondents were between the ages of 41-56 years while a very small proportion (1.8%) was 73 years and above. The mean age of the respondents was 50.51 years. This implies that the respondents were still within active and productive ages and can be efficient in agricultural production. In addition, their mean age suggests that they have sufficient knowledge and experience pertaining their environment and would be able to give vital information regarding climate change. According to IPCC (2007) any event is considered as climate change if it has occurred consistently for at least a period of one decade. Therefore, the mean age of the respondents which is above one decade would have enabled them observe such events. 
 
 
Sex
 
Data in Table 1 show that majority (55.7%) of the farmers were male while the remaining 44.3% were female. This reflects the dominance of male farmers in the study area. Studies have revealed that women are marginalized in most societies  in   developing   countries   (Ekong, 2003; Igbokwe, 2005; Ani, 2004) and this limits their access to natural resources   such   as   land thus   affecting   their involvement in agriculture. This marginalization could limit their access to agricultural services. For example, Holmes and James (2008) observed that in spite of the high ratio of agricultural extension staff to farmers in Ethiopia, female farmers still have limited access to extension services. This could increase the vulnerability of the farmers to climate change.
 
Marital status
 
Entries in Table 1 show that majority (70.7%) of the farmers were married while 20.8, 6.6 and 1.9% were widowed, divorced and single, respectively. Marriage could provide farmers with a supply of family labour, which is cheaper and readily available and also enhances the sharing of agricultural information and knowledge. According to Nnadi et al. (2012), marriage encourages complementarities of efforts among farming households. This could promote adaptation among farming households.
 
Educational qualification 
 
Results in Table 1 show that majority (99.10%) of the farmers had one form of formal education or the other while the remaining 0.9% had no formal education. It could be inferred from this that literate farmers dominate the study area though the level of literacy differed. The acquisition of formal education will increase the receipt of information on climate change, leading to a broader knowledge of it. According to Agbamu (2008), the acquisition of formal education promotes the adoption of improved agricultural technologies.
 
Household size
 
Data in Table 1 show that majority (52.9%) of the farmers had household sizes of between 6-10 persons. Others were 39.6 and 7.5% for household sizes of 1-5 and 11-15 persons, respectively. The mean (M) household size was seven persons. This shows that the farmers had fairly large households which could supply them with cheaper family labour. Large households would encourage diversification of enterprises by farmers thus increasing their productivity and income. It would also minimize expenses especially on labour. A study by Nnadi et al. (2012) confirmed that households in Imo State, Nigeria are fairly large.
 
Secondary occupation
 
Entries in Table 1 further show that majority (50.0%) of the    farmers   engaged   in    trading  as   a     secondary occupation   while  9.4, 3.8 and 1 .9%  indicated farming, driving and masonry, respectively as their secondary occupations. Rural people have been observed to diversify their means of livelihood as a way of adapting to climate change (Roncoli et al., 2010). Diversification of livelihood activities helps farmers to cope with climate change especially in the event of collapse of on.
 
Farming experience
 
Data in Table 1 show that a greater proportion (49.8%) of the respondents had engaged in farming activities for a period of 1-10 years. Also, 27.4 and 22.4% had been into farming for 11-20 years and 21 years respectively and above respectively. The mean farming experience was 14.30 years. This means that the respondents have practiced farming for a fairly long period of time enough to observe changes attributable to climate change. The period is also enough for the farmers to observe the effects of the changing climate. According to IPCC (2007), any change should be observed for at least one decade before it could be said to be climate change.
 
Farming system
 
Data in Table 1 reveal that majority (61.3%) of the farmers were  into  crop  production  while  the  remaining 31.1 and 7.5% were mixed and livestock farmers, respectively. This finding still attests to the fact that farmers in the study area diversify their enterprises. As observed by Rancoli et al. (2010), farmers in rural Kenya integrate crop and livestock production as a measure to cope with the changing climate.
 
Crops grown
 
Data in Table 1 also show that majority (65.2%) of the farmers cultivated cassava while 22.6, 7.5 and 7.4% cultivated yam, maize and cocoyam, respectively. Fundamentally, this result shows that the farmers cultivate more than one crop. The dominance of cassava in the area could be as a result of its ability to withstand adverse climatic conditions. Manyong et al. (2000) reported that cassava has the ability to survive suboptimal conditions such as drought and low soil fertility. However, the cultivation of other crops by the farmers could be seen as measure taken to cope with adverse climatic conditions considering the risks and uncertainties facing agricultural production.
 
Livestock kept
 
Entries in Table 1 show that majority (56.6%) of the farmers kept no livestock while 21.7, 12.3, 8.5  and  0.9% kept poultry, goat, sheep and pigs, respectively. Globally,livestock contributes about 40% to the agricultural GDP and constitutes about 30% the agricultural GDP of developing countries (World Bank, 2009). However, the non-participation of majority of the farmers in livestock production could be attributed to the increasing costs and risks involved in the enterprise. According to Moyo and Swanepoel (2010), the increasing risks and uncertainties related to climate change and associated shocks add another dimension to changes observed in livestock production.
 
Farm size
 
Data in Table 1 further reveal that majority (66.5%) had less than 1 ha farm size while 32.0 and 1.5% had 1 to 1.9 and 2 ha, respectively. The mean farm size was 1.0 ha. This shows that the farmers were predominantly small landholders which is in conformity with the assertion of the African Fertilizer Summit (2006) that small holder farmers cultivate between 0.8 to 1.2 ha of land. This could be attributed to the declining availability of land for agriculture due to urbanization and increasing population and consequently lower farmers’ productivity. 
 
Level of awareness of climate change
 
Data in Figure 1 show that a greater proportion (40.6%) of the farmers knew a little about climate change, 31.1 and 6.6% knew and knew a lot about climate change, respectively. The figure further shows that a significant proportion (21.7%) of the farmers does not know about climate change. The limited knowledge about climate change among the farmers could be as  a  result  of  their inability to access scientific information on climate change which could be attributed to inadequate number of extension staff in the area (Onyeneke and Madukwe, 2008). This may hamper their ability to adapt to climate change thus leading to poor agricultural harvests. According to Aklilu (2002), information about climate change is largely confined within the academia and research institutions thus limiting their availability to end-users.   
 
 
Perceived causes of climate change 
 
The mean scores of the respondents in Table 2 show that gas flaring (M = 2.07), violation of local customs (M = 2.01) and natural phenomena (M = 2.00) were perceived as main causes of climate change by the farmers in the study area. This perception may have been influenced by their limited access to scientific information on climate change which strengthens their reliance on personal observation and experience as sources of information on the phenomenon. As reported by (GoZ-UNDP/GEF, 2010) majority of the public in developing countries are yet to be properly and adequately informed about climate change. Similarly, Aklilu (2002) observed that information about climate change is still confined within the academia and research institutions in developing countries and consequently limiting local people’s access to such information. The unavailability of proper information on climate change will hamper the adaptive capacity of rural farmers, consequently worsening the growing cases of food insecurity and famine in the region. 
 
 
Combustion of fossil fuels has been reported as one of the major causes of climate change (SACAU, 2009). A study by Egbule (2010), reported that natural gas is still being flared in the Niger Delta region of Nigeria and  local people there perceived it as among the causes of climate change. Flaring of   natural   gas emits  GHGs   into   the atmosphere, thus increasing their concentration and leading to more warming effects.
 
The farmers also perceived climate change as a natural phenomenon. It is a common notion among local people that climate pattern varies naturally and they attribute it to the will of God. They strongly contend that climate is not stable so also are the weather elements like rainfall, sunshine and others. Though, climate variability is natural, scientific reports have shown that it is worsened by the emission of GHGs into the atmosphere (IPCC, 2007). This as a result exerts adverse influences on the ecosystem. 
 
The farmers further perceived climate change to be because of the violation of local customs. This is common in the rural areas where people attribute any disaster or mishap in their environment to the anger of the gods. They hold the view that certain evil deeds incur on the people the wrath of the gods which sometimes can persist for generations. According to them, such wraths can alter the usual pattern of climatic and weather elements which will affect adversely the means of livelihood of the people especially agriculture which has a close relationship with climate. For example, some communities in the Igbo society believe that incest or adultery can cause the land in the area to be infertile thereby leading to poor harvests. Some others believe that failure to offer sacrifices to the gods of the land before planting can provoke the gods leading to the cessation of the rain. This however is in agreement with the findings of Kelbessa (2007) that African local people associate climate change to such issues as the violation of local customs, the wrath of gods, the end of the sinful generation and natural phenomenon.  
 
Perceived impacts of climate change
 
Figure 2 shows that a greater proportion (49.0%) of the respondents perceived declining of crop yields was taken as the major impact of climate change on agriculture. Moreover, 17.0, 17.0, 15.0, 10.0, 5.0, 5.0, and 5.0% were perceived as declining soil fertility, drought events, increasing heat wave, high incidence of weed, changes in rainfall intensity and pattern, increasing incidences of pests and diseases on crops and excessive rainfall, respectively. This finding is in line with the report of a survey by Hassan and Nhemachena (2008) that increasing temperature, declining precipitation, changes in the pattern of rainfall and drought events are becoming more frequent.
 
The perception on declining soil fertility is in agreement with the model result which projects a reduction of suitable land for rain-fed agriculture and crop production. In Southern Africa, it is projected that this reduction could lead to net crop revenues dropping by as much as 90% (IPCC WGII, 2007).
 
Similarly, the perception on declining crop yields also is in line with the projection that climate change would reduce the production of maize in southern and western Africa, while decreases in North Africa’s wheat yields could increase famine (Warren et al., 2006). Furthermore, Fischer et al. (2002) reported a general decline in the production of most subsistent crops e.g. sorghum in Sudan, Ethiopia, Eritrea and Zambia. In addition, climate change is expected to impact negatively on agricultural production by increasing risks of exposure to new pests and disease variants (Ensor, 2009). The knowledge of climate change impacts on agriculture will enable farmers adopt technologies that will reduce these impacts.
 
 

 


 CONCLUSION

Rural farmers have observed the occurrence of climate change. However, their knowledge on the causes is still limited in the sense that it is more local than scientific. For example, it was perceived as a natural phenomenon and a punishment by the gods. This implies that local farmers still have inadequate access to information on climate change and this could hamper their adaptive capacity, thus worsening food insecurity situations. Poor capacity of the extension organization to disseminate climate change information could have contributed to this. Furthermore, the impacts were mainly felt on agriculture which is their major occupation. Climate change has continued to exert negative influences on agricultural development in developing countries. Hence, the attainment of food security has remained very impossible. Agriculture relies on the climate more especially in developing countries. Therefore, any change in the climatic conditions will have significant effects on agricultural production. 


 RECOMMENDATIONS

Following the findings made in the study, the following recommendations are made:
 
1. Relevant and up-to-date information on climate change should be made available to farmers. However, to ensure the provision of relevant information to the farmers, their information needs regarding climate change should be first determined to ensure that information provided to them is useful. Furthermore, to ensure the speedy and timely provision of this information, devices that  are  fast, cover a wide range of information users and cost-effective like the ICTs should be incorporated into extension service delivery and climate change adaptation programmes. The provision of climate change information through mobile phones and telecentres will facilitate the accessibility of information by rural farmers.
2. Sensitization campaigns should be mounted in rural areas to educate farmers on climate change. ICTs such as radio and television considering their potentials such as speed, number of people covered and cost-effectiveness should widely be used in the campaign on climate change.
3. Systems of agriculture and improved agricultural packages designed to help farmers adapt to climate change should be made available to the rural farmers. This may include improved crop varieties and livestock breeds, farm inputs and credit facilities. 


 CONFLICT OF INTEREST

The authors have not declared any conflict of interest.



 REFERENCES

Africa Fertilizer Summit (2006). Nigeria fertilizer strategy report. International Conference Centre, Abuja. 9th June, 2006, pp. 14-15.
 
Aklilu N (2007). Demanding climate justice. Interview by Schneider, B. 27 November, 2007. Berlin.
 
Ani AO (2004). Women in agriculture and rural development. Maiduguri, Nigeria: Priscaquila, P. 185.
 
Climate Change Information Resources, CCIR (2005). What causes global climate change? Climate change on agricultural resources. Norton, New York.
 
Ekong E (2003). Introduction to rural sociology. Uyo, Nigeria: Dove Educational Publishers. pp. 256-288.
 
Egbule CL (2010). Indigenous and emerging adaptive agricultural technologies to climate change adaptation in Niger Delta region of Nigeria. An unpublished M.Sc thesis of the Department of Agricultural Extension, University of Nigeria, Nsukka.
 
Ensor J (2009). Biodiverse agriculture for a changing climate. Practical actions UK.
 
Eva L (2009). Climate change, water and food security. Background Note. Oversea Development Institute, ODI.
 
Fischer G, Shah M, van Velhizien H (2002). Climate change and agricultural vulnerability. International Institute for Applied Systems Analysis, Austria.
 
Food and Agricultural Organization, FAO (1999). The state of food insecurity in the world. Rome, FAO.
 
GoZ-UNDP/GEF. (2010). Coping with drought and climate change project. Capacity needs assessment and strategy for enhanced use of seasonal climate forecasts for smallholder farmers in Chiredzi District. Final Report, 2010.
 
Hassan R, Nhemachena C (2008). Determinants of Africa farmers' strategies for adapting to climate change: Multinomial choice analysis.
 
Holmes R, James N (2009). Gender inequality, risk and vulnerability in the rural economy. Refocusing the public works agenda to take account of economic and social risks. Background of Report for SOFA, 2010.
 
IPCC WGII (2007). Climate change impacts, adaptation and vulnerability. Contributions of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, UK: Cambridge University Press, Cambridge, UK.
 
Kelbessa W (2007). Climate change impacts and indigenous coping strategies in Africa. Ph.D Thesis. A paper presented for the international conference on riding on a moral Storm. The global challenge of climate change: Curr. Sci. 85(1):46-59.
 
Manyong VM, Dixon AGO, Makinde KO, Bokanga M, Whyte J (2000). The contribution of IITA-improved cassava to food security in sub-Saharan Africa: An impact study. International Institute for Tropical Agriculture, Ibadan, Nigeria.
 
Ministry of Environment of the Federal Republic of Nigeria, MOE, FRN. (2003). Nigeria's First National Communication under the United Nations Framework Convention on Climate Change. Abuja, Nigeria.
 
Moyo S, Swanepoel FJC (2010). Multifunctionality of livestock in developing communities. In : Swanepoel, FJC, Stroebel A, Moyo S (Eds.), The role of livestock in developing communities: Enhancing multifunctionality CTA and UFS.
 
NEPAD (2002). Comprehensive Africa Agriculture Development Programme.
 
Oli B, Alec C (2009). Climate change and security in Africa: A study for the Nordic-African Foreign Ministers Meeting, 2009. Manitola: Canada. International Institute for Sustainable Development, IISD.
 
Onyeneke RU, Madukwe DK (2010). Adaptation Measures by CropFarmers in the Southeast RainforestZone of Nigeria to Climate Change. Sci. World J. 5 (1):32-34.
 
Roncoli C, Okoba B, Gathaara V, Ngugi J, Nganga T (2010). Adaptation to climate change for smallholder agriculture in Kenya: Community-based perspectives from five districts.
 
Shah M, Fischer G, van Velthuizen H (2008). Food security and sustainable agriculture: The challenges of climate change in sub-Sarahan Africa. Laxenburg: International Institute for Applied Systems Analysis.
 
Southern African Confederation of Agricultural Unions, SACAU (2009). Climate change: Key issues for farmers in Southern Africa, opportunities and possible responses. Discussion P. 3.
 
Umunakwe PC (2011). Strategies for climate change adaptation among rural households in Imo State, Nigeria.
 
Warren R, Arnell N, Nicholls R, Levy P, Price J (2006). Understanding the regional impacts of climate change. Research report prepared for the stern Review on the Economics of Climate Change, Tyndal Centre for Climate Change Research.
 
World Bank (2009). Minding the stock. Bringing public policy to bear on livestock sector development. Report No. 44010-GLB. The World Bank, Washington D.C., USA.
 
Ziervogel G, Nyong A, Osman B, Conde C, Cortes S, Downing T (2006). Climate variability and change: Implications for household food security. AIACC Working P. 20.
 

 




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