The capacity to produce food is essential to the survival of communities and societies across the world. There is also a need to increase the production capacity or agricultural outputs to coincide with the growing human population. However, limitations in natural resources, including arable land area, remain a particular hurdle to farming and food security. Vertical farming provides a solution for cultivating agricultural produces minus the use of extensive tracts of lands.
Vertical farming primarily involves the practice of producing food in vertically stacked layers and inclined surfaces, or in structures such as warehouses and buildings or skyscrapers. The most basic example is hydrop0nic farming that involves the use of hydroponic towers and the most complex ones are farms housed in buildings. Hence, the primary benefit or advantage of this practice centers on achieving sustainable food security. It still has limitations or disadvantages.
Pros: The Opportunities, Benefits, and Advantages of Vertical Farming
1. Improves Production Output and Maximizes Land Use
A remarkable opportunity from or advantage of vertical farming over traditional field agriculture is that it can help increase agricultural outputs by maximizing the use of lands. The study of Chirantan Banerjee and Lucie Adenaeur revealed that a 37-storey building standing on a 0.25 hectare of land was able to produce 3500 tons of different fruits and vegetables. Take note that field farming within a similar land area would not be able to produce as much.
The review study Kurt Benke and Bruce Tomkins also mentioned that vertical farming could address the issue concerning the declining farmlands across the world due to the reduction of fresh water supply or water scarcity, the effects of climate change, and the prioritization of land development toward urbanization or commercial and residential development. It can also integrate food production within existing urban areas or near urban areas.
2. Protects the Environment through Resource Conservation
Vertical farming also aims to address environmental issues associated with the use of limited natural resources and land areas. Specifically, because this practice involves maximizing the use of a limited land area, it can eliminate deforestation and desertification due to agricultural encroachment. It also eliminates farming practices that lead to soil erosion and nutrient runoff. This is one of the reasons why its proponents see it as a sustainable form of modern agriculture.
Furthermore, based on its foundational principles, vertical farming involves a closed-cycle design that maximizes the use of resources such as energy and fertilizers while minimizing losses due to runoff and leeching that are associated with field farming. The practice can be a component of a circular economy and more specific concepts like regenerative design and natural capitalism. Note that vertical farming can also be considered an example of regenerative agriculture.
3. Merges Food Production and Consumption in One Place
Another advantage of vertical farming is that it shortens the entire farm-to-market process by enabling urban farming. A review study by Kheir Al-Kodmany noted that cities or a particular locality like towns or entire provinces need to produce food internally to respond to demand from growing population, avoid price shocks, and address environmental issues concerning field farming. Accomplishing these means creating sustainable and self-sufficient local communities.
Vertical farming tackles the issues mentioned above. This benefit translates further to more specific opportunities and benefits like the promotion of self-sufficient cities, encouragement of urban growth, and the delivery of fresh and inexpensive food products. These are also aligned with the concept of a circular economy. Furthermore, because of the accessibility of agricultural products near dwellings, the practice can also support related public health initiatives.
4. Supports Diverse Crops through an Adaptable System
Vertical farming depends on the effective and efficient use of different technologies and practices such as hydroponic systems, aeroponics, aquaponics, greenhouse design, artificial intelligence, environmental control, and energy sustainability to collectively implement a controlled-environment agriculture or CEA technology. This technology can maintain the optimal growing conditions of agricultural produces and even animal-based food products.
Moreover, because a vertical farm can control different environmental variables like temperature, humidity, light, and nutrient distribution via controlled-environment agriculture, it can essentially support the cultivation of different types of crops that are sensitive and dependent to weather or other environmental preconditions. This means enabling communities or countries to domestically produce a variety of valuable crops and become food-sufficient.
5. Promotes the Efficient and Sustainable Use of Energy
Another advantage of vertical farming is that it can be aligned with renewable and alternative energy technologies. A facility can take advantage of photovoltaic solar panels to store and generate needed electricity for running its CES technology. It can also exploit methane digesters to produce energy. This involves building an on-site or in-house capability for transforming organic waste into biogas. The biogas can fire up fuel-based compact electricity generators.
There are ongoing studies and tests centered on generating electricity or producing fuels using natural and engineered plants and cultured bacteria. Hence, given the right use of current technologies or the future availability of more advanced technologies, a vertical farm can work off-the-grid and be self-sufficient. This is still aligned with the concept of circular economy and the more specific principles of regenerative agriculture and regenerative design.
6. Generates Multidisciplinary High-Skilled Jobs
There is also an opportunity or benefit centered on the creation of different types of occupations from different fields or disciplines. Promoting vertical farming means promoting high-tech green industry. It can lead to the generation of new careers for professionals in the fields of civil engineering and agriculture, computer science and information technology, project management, business and management, and marketing and retail, among others.
A new breed of farmers with relevant skills or knowledge would also be needed to manage planting, cultivation, monitoring, and harvesting. Demand for experts in the different subfields of science like agricultural science, biotechnology, bioengineering and genetics, plant pathology, and horticulture, among others, could also increase. The integration of multiple disciplines in a single agricultural operation can make vertical farming a key economic driver.
Cons: The Challenges, Limitations, and Disadvantages of Vertical Farming
1. Issues Regarding Economic Viability Due to Costs
Different concerns regarding economic feasibility collectively comprise one of the notable limitations or disadvantages of vertical farming. For example, Banerjee and Adenaeur noted that the 37-stored vertical farm on a quarter-hectare of land they investigated had an investment cost of more than USD 220 million. Note that this modern type of farm depends heavily on modern engineering and architecture, as well as the application of different technologies.
There is also a challenge over costs and competition for commercial spaces in cities. Building vertical farms in expensive cities can add to the total investment and operational costs. Endorsing the building of vertical farms could also increase occupancy cost and real estate value due to additional demand. This makes it unsuitable in dense urban areas like New York City and Hong Kong focusing on commercial activities and with premium real estate.
2. Possible Environmental and Energy Implications
There are also concerns over pollution and sustainable use. Crops grown indoors depend on artificial light. Note that sunlight can be exploited for natural lighting or self-sufficient generation of electricity through photovoltaic solar panels. The use of light-emitting diode or LED lamps also drives down the cost of electricity consumption. Of course, other than artificial lighting, a vertical farm includes complex machinery and automated systems.
Hence, when compared to field farming, vertical farming has an additional energy input. Renewable and alternative sources of energy can promote the ecological soundness of vertical farming. The fact remains that it can still produce a considerable carbon footprint if it still depends on the use of fossil fuels. There is a need to improve first renewable and alternative energy technologies to ensure the sustainability and energy efficiency of vertical farming.
3. Likely Disruption to the Rural Sector and its Communities
Another foreseen challenge and disadvantage of vertical farming involves the potential for disrupting the rural sector. This is especially true in communities with local economies that are dependent on agriculture. Vertical farms can render occupations in traditional farming obsolete. Farmers who do not have competencies in vertical farming would be sidelined. Communities dependent on traditional agriculture would suffer if they do not adopt.
Thus, based on the aforementioned, urban farming will essentially compete against rural farming. The review study of Benke and Tomkins noted that here is a need to devise and implement strategies or plans intended to educate government officials, create relevant laws or policies, and familiarize farmers to new trends in agriculture to transition to vertical farming effectively. Achieving this will take time and a considerable amount of resources.
4. Requires Advance Technologies and Complex Processes
Another possible disadvantage is the need to apply various technologies and design complex processes. Vertical farming is more complicated to initiate and maintain than traditional field agriculture because it requires the application of different skills and knowledges from different disciplines. This translates to higher startup costs from building, operating, and maintaining a vertical farm. The resource requirements also increase as the vertical farm scales.
Note that automation through artificial intelligence is essential for maintaining and regulating suitable in-door climate conditions without the need for regular human intervention. Technology will also be helpful for monitoring crops, recording outputs, and determining demands. Nevertheless, it would be challenging to build and operate a vertical farm for someone or an organization that does not have relevant competencies, connections, and capital.
FURTHER READINGS AND REFERENCES
- Al-Kodmany, K. 2018. “The Vertical Farm: A Review of Developments and Implications for the Vertical City.” Buildings. 8(24): 1-36. DOI: 10.3390/buildings8020024
- Banerjee, C. and Adenaeur, L. 2014. “Up, Up and Away! The Economics of Vertical Farming.” Journal of Agricultural Studies. 2(1): 40-60. DOI: 10.5296/jas.v2i1.4526
- Benke, K. and Tomkins, B. (2017). “Future Food-Production Systems: Vertical Farming and Controlled-Environment Agriculture.” Sustainability: Science, Practice, and Policy. 13(1): 13-27. DOI: 10.1080/15487733.2017.1394054
Photo credit: Claudio Palavecino Llanos