Lead Article
Kickstarting
sustainable agriculture in arid regions
By Except
Feeding populations in the most arid regions of our planet
has always been difficult, but in recent decades, it is turning into
a serious food security crisis in large parts of the world. The Gulf
Cooperation Council (GCC) region exemplifies this with an urgent challenge
on food security. Arid countries face the depletion of fossil water
sources, the increasing scarcity of fossil fertilizers, and more extreme
climatic conditions, which leads them to outsource their food production.
While increasing pressures on food production may trigger international
security challenges, the surging demand also presents world leaders
with an opportunity to improve existing agricultural systems. The challenges
the arid regions face are systemic and need to be addressed with a systemic
approach. How can we create a food industry that supplies food at scale
inside arid regions? We looked at this challenge in a systemic way,
outlining micro- and macro-scale impact solutions that have the potential
to drive a positive change in both medium- and long-term.
As a result of the fossil water crisis, population increase, prosperity
increase, and slow sector growth, exacerbated by looming climate change,
the domestic agricultural sector in the GCC is set for an expiration
date. With food being a primary necessity, food security is a core element
to the creation of a resilient society. The worlds arid regions
are struggling to maintain food security in an unfavorable environment.
We witnessed these issues during our project in the Kingdom of Saudi
Arabia and now aim to put them in the broader narrative of growing food
in arid regions.
Growing food
locally is a systemic change that can contribute to the sustainability
of the food supply chain.
Worsening factors ...
In Saudi Arabia, only 1.5% of the total land, approximately 1.000.000
hectares, qualifies as arable. The economic growth of the sector is
low, with roughly 2.5% per year, which lags behind the growth in consumption,
reducing food security every year.
Rapid population growth
intensifies the challenges that stem from the GGCs geographic
location. The predicted 23% increase until 2030 means more than 12 million
extra people to feed, of which the majority will be in KSA (Kingdom
of Saudi Arabia). Besides this, rising economic welfare will boost the
demand for food, as well as dietary diversity.
Another factor that increases
the severity of the issue is the energy transition. As many oil-producing
countries commit to building a non-oil-based economy, their main source
of income is likely to, at least temporarily, plunge. The energy transition
can only become reality when a healthy economic alternative, based on
other forms of value creation, advances. Relying on a majority of food
imports is an unsustainable pathway.
Saudi Arabia has the potential to use its economic
transitions to strengthen its agricultural sovereignty.
... and worsening
solutions
The existing solutions
to improve the GCCs food security only exacerbate, and are exacerbated
by, climate change.
Fossil water crisis
Starting in the 1970s,
the Saudi government set up a program tackling local production of food
security by setting up a huge agricultural program. The efficient center-pivot
irrigation system was rolled out on a wide scale, and drilling for fossil
water started. This method of irrigation has a significant advantage
in terms of efficiency over older methods of irrigation. Yet, still,
only around 40% of the water ever reaches the crops with this method.
For a short while, Saudi Arabia became a net exporter of wheat and other
water-intensive crops during the 1980s.
Yet the main sources of
irrigation water, the few large fossil water deposits, have been depleted
by over 80% in roughly 30 years. In response, KSAs government
prohibited the use of fossil water for the growth of cereals and crops
that are mainly used as animal fodder, such as alfalfa, in 2018.
KSA desert
crop fields.
Overdependence on imports
To ensure sufficient access
to nutrition, countries need to supplement domestic production with
imports. Income derived from fossil fuel exports facilitates this economically
in the GCC region. Import covers over 80% of Saudi Arabias domestic
food consumption, especially cereals.
Importing food is a solution
that extends or outsources the problem instead of solving it. By prohibiting
cattle crops domestically, the Saudi government forced companies to
seek resources elsewhere. As a result, Saudi Arabian food giants have
relocated their feedstock production with the purchase of 14.000 acres
(5666 ha) of farmland in Arizona and California. While crop relocation
may count as a short-to-mid-term solution, it de facto merely delays
a crisis and shifts the problem to other areas. The export ventures
employ the same water-intensive farming techniques, using finite water
sources in equal measure. This replicates their domestic problem elsewhere
and extends one expiration date with another.
Scaling up the possibilities
Food crises demand a serious
effort to move towards a more local, sustainable agriculture that relies
fully on renewable sources, usage of typically infertile land, and resource-effective
production in extreme climate conditions. It may never be possible,
or even desirable, to farm all food locally in the arid regions. Yet
by adopting a systemic perspective, it is possible to outline solutions
that have the largest potential for positive impact.
Every challenge holds a
set of potential solutions, either short- or long-term. The place where
these solutions overlap is called the solution space, and systemic long
term answers reside within its boundaries.
Scaling up the possibilities
Food crises demand a serious
effort to move towards a more local, sustainable agriculture that relies
fully on renewable sources, usage of typically infertile land, and resource-effective
production in extreme climate conditions. It may never be possible,
or even desirable, to farm all food locally in the arid regions. Yet
by adopting a systemic perspective, it is possible to outline solutions
that have the largest potential for positive impact.
Every challenge holds a
set of potential solutions, either short- or long-term. The place where
these solutions overlap is called the solution space, and systemic long
term answers reside within its boundaries.
To identify the systemic solution space, we first
need to identify system boundaries.
With the current state of technology, the crops that both have the most
negative impact, and for which growing systems can be relatively easily
adapted to the harsh arid climate, are fresh and perishable goods. The
value of growing these foods locally lies in both ensuring the populations
access to a healthy diet, but also a significant reduction of the environmental
impacts. Perishables, which constitute 20% of KSAs imports, require
fast cooled air freight and thus generate massive energy and CO2 footprints,
while also being costly.
The solution space in the
case of local food production in arid regions is a blend of various
micro-level solutions during the transition period necessary to achieve
macro-level ones. While de-desertification and desalination technologies
have the greatest potential to yield a positive impact on the agricultural
landscape of the GCC, their scaling up needs considerable systemic changes,
including fiscal ones. Micro-solutions, on the other hand, are more
easily adaptable yet have a smaller scale of impact.
With the current state
of technology, the crops that both have the most negative impact, and
for which growing systems can be relatively easily adapted to the harsh
arid climate, are fresh and perishable goods. The value of growing these
foods locally lies in both ensuring the populations access to
a healthy diet, but also a significant reduction of the environmental
impacts. Perishables, which constitute 20% of KSAs imports, require
fast cooled air freight and thus generate massive energy and CO2 footprints,
while also being costly.
Long-term goal - solutions on a macro scale
De-desertification
The solution space in the
case of local food production in arid regions is a blend of various
micro-level solutions during the transition period necessary to achieve
macro-level ones. While de-desertification and desalination technologies
have the greatest potential to yield a positive impact on the agricultural
landscape of the GCC, their scaling up needs considerable systemic changes,
including fiscal ones. Micro-solutions, on the other hand, are more
easily adaptable yet have a smaller scale of impact.
Combining de-desertification with greenhouse agriculture
can significantly improve arid regions food security.
Desalination Technology
Reducing pressure on fossil
water sources has to come from more abundant desalination of seawater.
Desalinated water can be used for any type of crop, most efficiently
perishables. As such, desalination reduces agricultures strain
on freshwater, consequently improving water and food security. Yet,
at the moment, typical desalination processes are highly energy-consuming.
More efficient methods, such as reverse osmosis, forward osmosis, and
multi-effect distillation combined with the use of waste heat, are becoming
economically viable. The current energy shift worldwide also raises
hopes that soon, desalination will be fueled by renewable energy. Once
those challenges are overcome so that the process can happen sustainably,
desalination offers a gateway for arid and semi-arid regions.
During the transition
- micro impact solutions
Saline
Agriculture
Saline practices open up
options in terms of location and water tolerance. The resulting flexibility
may bridge the gap in time until advancements in desalination allow
for reaching sufficient freshwater capacity. The practices can additionally
close freshwater capacity gaps. Many countries around the world are
working towards crop stocks, using plant breeding, to grow to produce
in partly saline soil. Such soil would conventionally be considered
hazardous to crops. However, many crops already possess halophilic (salt-tolerating)
genetic lines, including staple crops like tomatoes and potatoes. Specific
varieties of carrots, red onions, barley, white cabbage, and broccoli
have also proven to be partially salt-tolerant if grown in a specific
way. While the market still needs to ready itself for this, alternative
food crops such as more expansive use of seaweeds and sea kale are on
the rise and subject to much experimentation around the world.
Large-scale, local agriculture in arid regions
will have a global impact on sustainability of food chains.
Greenhouse horticulture
This solution can bring
a part of the food production back to the arid countries by supplying
them with specific crops, such as fresh fruit and vegetables, locally.
Greenhouse horticulture is most commonly used to make the most of available
resources, such as sunlight, as well as to shield the plants from the
harmful elements in the environment and elongate the growing season.
Originally, the method was used in areas where low temperatures did
not allow for longer growing seasons, and for crops that were sensitive
to the cold. Applying lights, heating, cooling, and air conditioning,
as well as sophisticated watering systems and CO2 supply, have transformed
greenhouses into flexible high-tech growing systems. In some cases,
they can increase the productivity of a piece of land by over 400%.
Increasingly, greenhouses appear in areas where the temperature is too
high to grow efficiently. Cooling can increase the growing efficiency
of the crops, as well as reduce the evaporation and thus the water use.
A closed greenhouse can reduce water use by over 90% compared to outdoor
cultivation.
A visualization of Serenity Farms, a greenhouse complex
mixing high-tech green horticulture with renewable energy sources.
Plant Factories
Options to intensify crop
density are increasingly available. Such options present a beneficial
solution when it comes to climate control. Plant factories, unlike greenhouses,
are solid buildings that can be integrated into the urban environment.
Plants are vertically stacked under artificial light, in an entirely
controlled environment. The growth rates, and with it the output volume,
of these factories, are incomparably higher than those of open field
practices. However, their crop selection is limited to leafy greens
due to multiple growing levels being stacked under artificial lighting.
This limitation may be overshadowed by the under-studied feasibility
of this solution for a desert climate. Thanks to the specific features,
such as insulation, high volume, and climate regulation, among others,
plant factories can yield significantly higher results than other solutions.
Their higher cost of both development and operations may prove inhibiting
for feasible food production, except in high density areas where land
footprint comes at a premium, or until these systems have been made
sufficiently efficient.
Drip irrigation
The potential of drip irrigation
as a medium-scale solution for field agriculture lies in its ability
to replace the central pivot method. Increasing efficiency saves vital
water resources, especially as losses of water through evaporation are
responsible for the main fraction of water consumption in arid regions.
Far less than 40% of sprayed water ever becomes available to the plant,
even though practices that use spraying, including central pivot methods,
are still prevalent. Drip irrigation provides a promising alternative
and a bridge towards a more permanent solution. Although already widely
applied within the urban environment, the method currently uses a mere
fraction of its potential in open-field agriculture.
Serenity Farms
Serenity Farms is a project
that plays a role to relieve pressures on both the macro and micro levels.
Desalinating water with renewable sources of energy on the one hand
and using sustainable, high-tech greenhouse horticulture on the other,
Serenity Farms creates a domestic production capacity of high-quality
produce. The design sets a precedent for a new generation of grass-roots
solutions that contribute to sustainable agriculture in arid regions
and a domestic source of fresh and healthy fruits and vegetables. However,
solutions like these have their limitations. While Serenity Farms tackles
the most impactful crop types, fresh fruit and vegetables, it cannot
solve food shortages alone. Even when scaled up to their full potential,
Serenity Farms stops short of tackling the domestic deficits in the
form of cereals and meat industry fodder, which are unlikely to be solved
domestically. True solutions, serving a global scale, will need to come
from national and international governance, combining different approaches
in a holistic system solution.
Technology system map for Serenity Farms.
Towards a systemic approach
Environmental concerns
aside, the beauty of the transition towards sustainable, local agriculture
is that it makes business sense. Each of the proposed solutions is scalable
into relatively quick investment returns and profitability, and this
trend will only increase with more research on growing food in arid
regions coming to light. Strengthened domestic production, improved
environment, and consistent profits - growing food in arid regions only
creates winners. It is time for investors, farmers, and governments
alike to grasp this opportunity. The first step towards activating this
is to develop a systemic food security plan for each country, and rally
investments into the right combination of approaches at the same time.
The next few decades will be decisive for arid regions, and specifically
the GCC. If no substantial investments are leveraged for improved domestic
production, and development of a long term systemic plan, issues will
only exacerbate until system failure. If the issue of food security
is put at the forefront, however, the GCC can take leadership in food
production solution in harsh climates, and take a strong non-oil economic
position that the rest of the world is also in dire need of.
The article was written by Jacob
Verhaart, Except's Head of Science, and Jon
Woning, Except's Biotechnologist; and edited by Zuza
Nazaruk, Except's Creative Communicator. Except
Integrated Sustainability
References
Camels
Dont Fly, Deserts Dont Bloom
Climate
change and water scarcity: the case of Saudi Arabia
Saudi
Arabia - Ban on green fodder cultivation comes into effect
Foodex
Saudi 2021
Fossil
Aquifers
Saudi
Arabias great thirst
Saudi
Arabia Agricultural Overview
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