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8/4/2019 Paper 34 APN Conference 10 January
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Role of processed fuels in cooking energy transitions
Abhishek Kar1*
, Sumeet Mohanty2
, Lokendra Singh1
, Anupama Arora1
, Ibrahim
Hafeezur Rehman1, Ram Chandra Pal1
1 The Energy and Resources Institute, New Delhi, India
2 Indian Institute of Technology, Kharagpur, India
* Corresponding Author akar@teri.res.in +91-9899972727
mailto:akar@teri.res.inmailto:akar@teri.res.in -
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Abstract
In the backdrop of a dominant regime of direct combustion of fuel wood and
agricultural residue as cooking fuel, a transition experiment on processed fuel is
being carried out in a village in India by The Energy and Resources Institute
(TERI) supported by Government of India. Direct combustion of low density
agricultural residues leads to significantly low energy yield per unit volume of
biomass consumed. It is expected that a value chain for processed fuel (through
densification of agricultural residue to yield high energy density low volume mass
through Pelletization process) catering to cooking fuel need of rural households
can contribute to sustainability transition. In the context of renewed interest in
improved stoves, processed fuel (pellets) can improve performance of such stoves
because of consistency in size, energy content, and moisture level resulting in
increased fuel efficiency along with reduction in indoor air pollution. Many
households in developing countries are forced to purchase fuel wood to
supplement their non-monetized biomass fuel supply. Hence, pellets can
potentially become a commercially sustainable substitute to the existing
traditional fuel wood market regime. Further, biomass like fallen leaves, which
otherwise remains unutilized and rots in the open creating a threat to public
health, can be utilized as feedstock for pellet. The experiment has been analyzed
as asustainability experimentin this paper using the Strategic Niche Management
(SNM) framework to understand the innovation and identify its strengths and
short-comings by understanding the interaction between three internal niche
processes.
Keywords: fuel processing, biomass, pellet, rural energy, SNM
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1.0 Introduction: One of the key concerns related to transitions to a more sustainable energy
sector has been fuel and technology switching in rural households of the developing
world (Rehman et al., 2010). Without access to modern cooking and heating energy
technologies and fuel, domestic households are forced to use unprocessed solid biomass
in traditional mud stoves (Ravindranath and Balachandra, 2009). It is felt that while
renewed interest in research and investment in cooking devices is pertinent
(Venkataraman et al., 2010), it is also worthwhile to focus on processing of biomass
which can further improve performance of these stoves for rural households (Rehman et
al., 2010, Sharma, Mukunda and Sridhar, 2009). Romjin, Raven and Visser (2010) have
raised concerns on sustainability challenges of structural over-usage of unprocessed
biomass for meeting household energy needs which is characterized by low efficiency
and negative public health and environmental impacts (Ravindranath and Balachandra,
2009).
An experimental project (Kemp, Schot and Hoogma, 1998) involving research,
production and dissemination of pellets (processed biomass based cooking fuel) targeted
at rural households is being implemented by The Energy and Resources Institute (TERI)
in Uttar Pradesh state of India with financial support from Government of India in 2010.
With potential to contribute to sustainable development, the experiment has been
analyzed as a sustainability experimentin this paper using the Strategic Niche
Management (SNM) framework to understand the innovation (Witkamp, Raven and
Royakkers, 2010). To this end, the paper gives an overview of the dominant regime and
landscape factors (section 2) and an introduction to the pelletization technology and its
significant social and environmental benefits (section 3). In section 4, analyses of the
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dynamics played by the three inter-related processes which are important for niche
development (Berkhout et al., 2010) in context of the project is carried out apart from
describing the protection offered under the experiment (Raven, 2005). In conclusion
(section 5), the paper builds a case for about the need for further research in pelletization
technology and implementation of multiple pelletization projects to create a technology
niche which in the long run can contribute to sustainable transition.
2.0 Existing regime characteristics- wide spread unprocessed solid biomass usage as
cooking fuel: Across the developing world, women are dependent on collected or
purchased biomass as cooking fuel. Non-monetized cooking fuel comprises of fuel wood
(defined by Saxena (1997) as fallen wood, smaller pieces, twigs, wood shavings, saw
dust, bark and roots which have no alternative applications), unutilized (not suitable
either as feed or fodder) agricultural by-products like rice straw, mustard stalk etc., and
dried cattle manure, which are used as cooking fuel by rural households in India and
across the developing world (Ravindranath and Balachandra, 2009). Increasingly, more
and more households are also forced to purchase hardwood due to scarcity of fuel wood
in vicinity. This existing bioenergy based cooking regime is dominatedby a combination
of structures, culture and practices such as lack of cash surplus and absence of reliable
supply/access to enable switching over to modern fuels like LPG or processed biomass
based fuel (Raven, Bosch, and Weterings, 2007, Ravindranath and Balachandra, 2009).
About 85% of Indias 159 million rural households and 21.5% of 63 million urban
households use solid un-processed bio-fuels in traditional mud stoves for cooking
purpose (Parashar et al., 2005, NSS, 2010).
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Such cooking practice is characterized with incomplete combustion resulting in emission
of pollutants such as particulate matter (PM), carbon monoxide (CO), nitrogen & sulfur
oxides (NOx and SOx) and other toxic compounds including poly-aromatic hydrocarbons
(PAHs) (Smith et al., 2005) which mostly occurs inside poorly ventilated kitchens in
rural areas across developing countries (Desai et al, 2004). Indoor air pollution (IAP)
increases risk of pneumonia, acute lower respiratory infections (ALRI) among children
under 5 years and chronic obstructive pulmonary disease (COPD) among adults over 30
years of age (Arcenas et al, 2010, Rehfuess et al., 2006). Approximately half a million
premature deaths and nearly 500 million cases of illness are estimated to occur annually
as a result of exposure to smoke emissions from biomass use by households in India
(UNDP/ ESMAP, 2003). It has also been reported that women and children spend
significant time in collection of cooking fuels which have negative health and safety
implications (World Bank, 2003).
3.0 Alternative to existing regime: Pelletization as a form of biomass processing
3.1 Continued dependence on biomass fuels: Considering IEA (2007) estimates
that dependence on unprocessed solid biofuels for cooking is expected to continue
in foreseeable future (632 million Indians estimated to be dependent in 2030) in
conjunction with expected population explosion (and consequent stress on natural
resources), it is imperative to look into biomass fuel processing for such rural
households (Rehman et al., 2010).
3.2 Biomass processing: Biomass processing in the context of cooking fuel for
households involves low cost densification of low grade fuel wood (Saxena,
1997), agricultural residues and other bio-waste such as fallen leaves to develop a
fuel block which can be cleanly combusted to extract energy for cooking or
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heating application (Sharma, Mukunda and Sridhar, 2009). Pelletization is one of
the most prevalent densification processes for biomass resources. Mani (2005)
define it as a mechanized method of densifying biomass such that the bulk density
becomes more than 500 kg/m3 and the moisture reduces to about 8% on a wet
basis. Manufacturing of pellets involves drying of biomass, grinding, and the
pelleting process.
Pelletization of biomass waste and its emergence as a competitor to purchased
fuel wood may be envisioned as a transition from this existing dominant regime
of unprocessed biomass usage as cooking fuel. While research on fuel
densification has been carried out earlier (Saxena, 1997), the scope of research
was targeted at heating applications for processing industries. Under this
transition experiment, the focus is on densification of locally available low cost
biomass for usage as household cooking fuel in a decentralized manner.
3.3 Characteristics and advantages of pelletization: During a given task of boiling
water in a forced draft stove, performance of pellets was compared with hard
wood purchased locally for various aspects such as reduction in indoor air
pollution and reduction in fuel feeding iterations. The results are discussed in
relevant sections related to the advantages of pelletization.
3.3.1 Improved combustion of pellets reduces emission: Fuel
characteristics like packing density of the fuel and moisture content
also affect emissions during combustion (Sharma, Mukunda and
Sridhar, 2009, Atkins et al., 2010). Processed fuel, in form of pellets,
are generally more suitable for burning in stoves because of greater
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density, consistency in size, and lower moisture level thus reducing
emissions. Exposure of cook to black carbon concentration, which is
an important indicator of indoor air pollution, reduced by 50% when
pellets were used in lieu of wood.
3.3.1.1 Size: Atkins et al (2010) indicated that homogeneous size
distribution of wood fuel can significantly increase combustion
efficiency. Further, smaller wood pieces (difficult to chop
manually) with higher surface area to volume ratio expedites
burning as more fuel surface area is exposed to the combustion
chamber temperature resulting in greater heat absorbance per
unit time (Yang et al., 2005). A survey commissioned by TERI
in the project area indicated that manually chopped wood
pieces (greater than 10 cm in length, 5 cm in width and 3 cm in
height) are used for cooking in rural households. TERI pellets
have homogeneity in shape (cylindrical) and size (2 cm length
and 1 cm diameter) resulting in improved combustion.
3.3.1.2 Low Moisture content: Atkins et al. (2010) have reported that
biomass with high moisture content emits significant amounts
of smoke before it can burn properly, as the fuel is unable to
attain the requisite high combustion temperatures quickly.
Gathered biomass or even purchased hardwood has high
moisture content in comparison to pellets which being
produced though a mechanized exothermic process has
moisture content less than 10% (Shokansanj and Felton, 2006).
Greater the moisture content in the fuel during combustion
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more will be the heat of combustion1 which is waste energy as
it converts the moisture to water vapor and does not contribute
to cooking thereby reducing energy efficiency (Van Loo and
Koppejan, 2006). TERI pellets have average moisture content
of 9% to 11% during packing.
3.3.2 Usage of waste biomass: Ravindranath and Balachandra (2009)
estimated that the total agro-residue production in India exceeded 450
Mtons/year out of which the biomass available for energy purposes
amounts to 150 Mtons out of which only 11% is being utilized.
Surplus and unused biomass is usually burnt in the open field, causing
air pollution. Production of pellets locally as clean burning cooking
fuel from locally available resources will create a market for the waste
biomass, providing an incentive to farmers to sell their unused
biomass, instead of burning it. Biomass sources like fallen leaves of
mango and mahua trees which have no food or fodder value have been
utilized in pellet production. TERI pellets have 45% saw dust, 5% rice
husk and 25% fallen leaves and the rest of previous cycle pellet
powder residue and binders.
3.3.3 Easy usage
3.3.3.1 Reduced fuel feed iterations: Chin and Siddiqui (2000)
established an empirical relationship between die pressure
applied during biomass densification (which implies increasing
packing density2 of the densified biomass known as pellet or
briquette) and combustion rate in a standard combustion
1Moisture content increases the specific heat capacity of the fuel because additional amount of heat is required to vaporize the water present
thereby taking more time to reach ignition temperature leading to poor combustion in initial burning period.2 Packing density simply refers to the mass per unit volume of the solid, in this case the fuel
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device. It is observed that as die pressure increases, it leads to
a decrease in the combustion rate and hence increase residence
time. TERI pellets require 14% less fuel charges for a given
task in comparison to hard wood purchased from local market.
3.3.3.2 Easy handling and storage: Past research (Bergmann, 2005;
Mani, 2005) suggests that pellets, unlike raw biomass have a
high packing density hence, rigidity which leads to lower
transportation costs as well as less handling problems, thereby
making it an ideal fuel for domestic stoves. Lehtikangas (1999)
has reported that biomass pellets are less susceptible to
biological decay in comparison to unprocessed biomass due to
lower moisture content, thereby prolonging their storage
period.
4.0 Application of SNM framework to assess success potential of the experimental
project: While SNM has traditionally been used to analyze historical case studies in
retrospective it has a role of technology management strategy of ongoing projects
(Raven, Bosch, and Weterings, 2007). Transition literature identifies three interrelated
processes - voicing and shaping of expectations, network formation and learning &
articulation that influence the potential success of the introduction of an innovation (here,
pelletization) in the context of niche development (Raven, 2005). In the following
sections, each of these three processes has been discussed in the context of this ongoing
experimental project apart from highlighting how the experimental project was offered
protected space.
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4.1 Voicing and shaping of actor expectations: Like any other experimental project,
actor expectations about commercial potential of pellets played an important role
in the early stages of the experiment which enabled investment of resources
(including time and money) when no market existed for pellets (Raven, 2005).
Playing the role of an action research organization, TERI has been instrumental in
voicing concerns (articulating expectations in SNM) about biomass scarcity and
the urgent need to explore biomass based fuel processing for household cooking
fuel in different forums in terms of technology development and commercial
sustainability. As suggested by Raven, Bosch, and Weterings (2007), it attracted
attention and resources of policy makers and government. As a result, the project
sponsor- GoI believed in the societal, economic and environmental benefits of
decentralized fuel processing and its commercial potential and hence agreed to
generously fund a pilot demonstration project. The village entrepreneur, a
businessman, believed in the shared (with TERI) vision of a potential market for
low cost pellet produced from locally available waste biomass and shared initial
project cost. However, it should be noted that protection by project funds in terms
of substantially covering capital costs lowered entrepreneurs risk exposure
(Raven, 2005). Initially demonstration and trials for various combinations (of raw
materials) for pelletization was carried out over a period of three months
involving 0.4 tonnes of pellets across 150 households. It helped in voicing and
shaping of expectation in terms of:
4.1.1 Identification of target customer: During the first round of user trials
actors were encouraged to express their opinion of the commercial
potential of these products. It was communicated by the end users
(actors who are critical for sustainability of such initiatives) during
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first round of trials that pellets will be purchased only by those
households who purchase hard wood from market to meet entire fuel
need or to supplement their gathered biomass. Families using non-
monetized biomass gathered locally articulated their decision of not
intending to switch over to monetized pellets irrespective of its current
and future benefits. Hence, the initial entrepreneur (actor) expectation
of catering to rural households became more specific (Hoogma,
2000) in terms of catering to only those households who purchase fuel
wood where subsequent user trials were conducted.
4.1.2 Creation of price ceiling: During user trials in 45 such households,
majority of end users articulated there inability to spend more than
their then current expenses for cooking fuel irrespective of its
characteristics like lesser smoke. Such price sensitivity created a price
ceiling of 100 USD/tonne for pellets which then was the rate of locally
available hard wood making pricing expectation more specific which
led to re-structuring of pellet composition.
4.1.3 Positive response during trials: As more experiments (user trials)
supported expectations (of a comparatively clean burning and easy to
use fuel at the same price of hard wood), quality of expectations
increased (Raven, 2005; Hoogma, 2000). During user trials as both
end users expressed willingness to purchase pellets and the
entrepreneur being confident of producing pellets within the price
ceiling.
4.1.4 Increased demand for user trials: When the word about user trials
spread, 120 more end users, who then purchased hardwood , expressed
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interest to be part of user trials and insisted on getting samples
before they make purchase decisions. It created more robust user
expectations about pellets as larger number of relevant actors shared
the same expectation (Raven, 2005) of commercial potential of
pellets.
As suggested by transition scholars, this process of articulating and
negotiating shared expectations provided direction to the experiment
(Witkamp, Raven and Royakkers, 2010). As a result, almost 100
households, who earlier used locally purchased hard wood as cooking
fuel, have switched over to pellets (repeat purchase) within a period of
six months having purchased more than 1100 kg at market price (zero
subsidy) of USD 100 per tonne as on 30th November 2010. Overall, it
may be deducted that experimental project had fairly specific and
quality expectations which were growing increasingly robust thereby
improving the chance of successful niche development (Hoogma,
2000).
4.2 Actor network formation: The importance of creating networks in terms of
reducing complexity, scale, investments, risks, and uncertainty by involving
actors from different domains in the project has been extensively highlighted in
transition literature (Mourik and Raven, 2006; Raven, Bosch, and Weterings,
2007). Under this experimental project, conscious decisions were taken to actively
engage multiple actors besides TERI, entrepreneur and end users as it improves
the scope of niche development (Raven, 2005) in the following ways:
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4.2.1 Identify and sensitize potential actors to be part of the network:
TERI has made conscious efforts to ensure than potential stakeholders
from societal, policy and technology domains like key policy makers
and global development institutions like UNDP and DFID officials are
aware of the vision and activities of this experimental project through
periodic briefings and site visits. TERI also requests project sponsor to
undertake multiple mid-term project reviews as the review team
consist of subject experts and influential policy makers who can
potentially play active role in the network. Publications and
dissemination of information (like presentation of this paper in this
conference on Innovation and Sustainability Transitions in Asia)
regarding this project is also being carried out to get expert inputs.
However, it is felt that there is need to more actively engage local
public representatives and community leaders.
4.2.2 Continuous engagement and cross relation amongst network
actors: End user and production teams used to interact on a regular
basis during user trials. However, reluctance of entrepreneur to get in
touch with end users post-sales has been reported and corrective
actions are currently being taken. Further, cross-relation between
actors, sans TERI, has been almost absent which can be a major hurdle
in improvement of network alignment (Raven, 2005).
In conclusion, the existing actor network is heavily TERI dependent
with low cross relationship between other actors which requires
corrective action.
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4.3 Learning processes: Learning in the context of SNM is focused on the changes
executed in the process of the experiment (technology development, actor
interaction etc.) which is aimed to couple with opportunities and overcome
oppositions/barriers in the environment outside of the local project for better
functioning of the innovation (Mourik and Raven, 2006). Under the project, three
key learning processes as mentioned by Raven, Bosch, and Weterings (2007)
have been discussed below in context of the experimental project:
4.3.1 Techno-economic optimization: In order to keep the pellet
production cost within the price ceiling set (please refer to 4.1.2), the
composition of pellet was significantly modified. The proportion of
relatively expensive biomass like rice husk (costing 55 USD/ tonne)
was reduced from 25% to 5% while proportion of freely available
fallen leaves (collection cost of 22 USD/ tonne) was increased from
5% to 25%. As Raven, Bosch, and Weterings (2007) suggested, such
adjustment of technology increases the possibility of successful
diffusion.
4.3.2 Alignment between technical and social aspects: Berkhout et al.
(2010) has highlighted the importance of alignment of user preferences
with technology specifications. Raven (2005) has also highlighted the
important role played by users in the learning process of an
experimental project which is demonstrated in the following section in
terms of negotiating the packaging type.
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4.3.2.1.1 Packaging: During the first round of sales, the
pellets were packaged in 25 kg sacks which lowered
per unit cost of packaging and distribution. It was
reported that some households required 15-20 days
to consume the pellets. Because most rural
households have damp conditions due to thatched
house, the pellets absorbed moisture and performed
poorly in later stage. By early next year, pellets will
also be sold in 5kg jute bags. This has also triggered
unintended add-on benefit of higher demand as
consumers without significant cash surplus prefer
the smaller packs.
4.3.2.1.2 Ignition Style: User feedback pointed out to
difficulty in ignition of pellets and requirement of
large quantities (in some cases exceeding 25 ml;
kerosene costs 0.25 USD/ litre) of kerosene, the
technology usage manual was revised and it
recommended usage of 10- 20 gm of twigs during
lighting the stove along with pellets which
generated enough heat for pellets to reach ignition
temperature.
4.3.3 Reflexive action: Laak, Raven and Verbong (2007) define reflexive
action in transition literature as attention/inclination to question
underlying assumptions such as social values, and the willingness to
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change course if the technology does not match these assumptions.
Under the project, no such reflexive action was demonstrated.
It may be concluded that while there is evidence of first-order learning, defined by
Raven (2005) as learning about the effectiveness of a certain technology to
achieve a specific goal, there is significant scope of improvement in terms of
second order learning of reflexive action .
4.4 Protection from regime: As Caniels and Romijn (2008) points out that the
rationale of protection is to create a space for experimenting with and executing
the innovation process without being subject to immediate market pressures, this
experimental project was protected in multiple direct and indirect ways.
4.4.1 Supply side: The project offered direct protection to ensure regular
supply of pellets both for user trials and off the shelf stock in an
environment without any immediate and direct market demand which
are described below:
4.4.1.1 Capital cost subsidy: As it was a government sponsored
project, local entrepreneur did not bear the capital cost of pellet
machine or initial establishment cost like power connectivity
cost and hence has the liberty of conducting variety of resource
intensive experiments to develop quality pellets instead of
focusing of achieving break even. Further, this enabled
reduction of pellet cost to not only to maintain the price ceiling
but also to make profit of about 120 USD/tonne. As Raven
(2005) pointed out, such protected space created on the basis
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of expectations (by the sponsor) enabled technologists to focus
on development of a radical technology which had no
contemporary market value thereby providing temporary
exemption from dominant regime rules.
4.4.1.2 Technical handholding: Technical and marketing experts
from TERI were engaged in hand holding of the entrepreneur
and his team across the entire value chain- from machine
selection to home delivery of pellets. It helped build local
capacity to carry out pelletization as a professional commercial
enterprise.
4.4.2 Demand side: TERI also executed other activities in the same area
which helped indirectly in creating demand for pellets which are
described below:
4.4.2.1 Awareness about benefits related to clean cooking:
Extensive awareness generation campaigns under the project
were carried out to sensitize local community about benefits of
clean cooking which otherwise would be significantly
expensive for pellet entrepreneur.
4.4.2.2 Dissemination of forced draft stoves: Forced draft cook
stoves with top-loading system (which require small size wood
pieces) were disseminated to almost 1000 households in that
area under other project activities. These beneficiaries faced a
manually tedious job of chopping wood and hence households
who were then already purchasing wood expressed interest to
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purchase small sized pellets which will save the hard work at
no extra price.
Such unique local conditions helped in development of a technological
niche for the radical innovation of pellets which helped users to
create/learn about a new need-pellets and the technology provider to
receive user feedback leading to improvement of quality and reduction
of cost (Raven, 2005; Mourik and Raven, 2006). Lessons drawn from
this experimental project can help create a market in the long run
where a technologically capable entrepreneur can supply pellets in a
commercially sustainable manner thereby replacing the dominant
regime of biomass under-utilization and usage of wood as cooking
fuel.
5.0 Conclusion: Like any other radical innovation, pelletization would require a long
process (even more than a decade) of mutual adjustment and adaptation to form a part of
the then dominant regime of household energy consumption behavior (van Eijck and
Romijn, 2008). As Raven (2005) also pointed out niches are at the cosmopolitan level
of- and above- the local practices of experimental projects, there is need to investigate
the barriers to horizontal scaling of the experimental projectto a scale which is beyond
the local level to be categorized as a niche (Mourik and Raven, 2006). SNM can
significantly contribute to this process by managing the interaction between the different
local projects, and by managing the interaction between these local projects and the wider
selection environment -regime and landscape (Mourik and Raven, 2006). As single
experiments do not result in regime change (Raven, 2005), it is necessary to involve more
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actors for further research in pelletization technology and implementation of multiple
pelletization projects across various agro-climatic and socio-economic zones to enable
comparison between local practices and development of generic lessons. As Raven,
Bosch, and Weterings (2007) suggest, it is also critical to engage in aggregation
activities like technology standardization, documentation and dissemination of best
practices related to biomass resource assessment to identify potential ingredients, trial
and error of combinations, demand assessment and marketing of pellets. This process is
expected to gradually add up to a new technology trajectory which is envisaged to
result in sustainable transition to processing of bio-resources at local level as cooking fuel
in the long run.
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