Food is a fundamental human need. And yet, for hundreds of millions of people around the world, access to adequate, safe, and nutritious food cannot be taken for granted. Understanding what food security truly means, and what threatens it, is the first step toward building a world where everyone has enough to eat.

At the Solar Electric Light Fund (SELF), food security is not an abstract policy concept. It is something we work toward every day, in communities across the Americas, Africa, and beyond. Our Solar Market Garden program has shown us firsthand what it means when a community gains food security, and what it costs when they do not. So let us start with the basics.

What Is Food Security and Food Insecurity?

The United Nations Food and Agriculture Organization (FAO) defines food security as existing when all people, at all times, have physical, social, and economic access to sufficient, safe, and nutritious food that meets their dietary needs and food preferences for an active and healthy life.

That definition contains a great deal within it. Food security is not simply about whether food exists somewhere in the world. It is about whether specific people, in specific places, can reliably access food that is safe and nutritious enough to support their wellbeing. When any part of that equation fails, food insecurity results.

Food insecurity is the condition of not having consistent access to enough food for an active, healthy life. It exists on a spectrum. Mild food insecurity may mean worrying about where the next meal will come from or making difficult trade-offs between food and other basic needs. Severe food insecurity can mean going entire days without eating, or watching children suffer the effects of chronic malnutrition. According to the FAO, nearly 733 million people faced hunger in 2023. Hundreds of millions more experience moderate food insecurity on a daily basis.

Understanding food security and food insecurity requires looking beyond the question of whether food is produced. It requires examining who can access it, in what condition, and with what reliability.

The Four Pillars of Food Security

The FAO framework identifies four interconnected dimensions that together define food security. These are widely known as the four pillars of food security: availability, access, utilization, and stability. Each pillar matters on its own. But it is only when all four are in place simultaneously that true food security is achieved.

Pillar One: Availability

Food availability refers to whether sufficient quantities of food exist, either through domestic production, imports, or food aid. A region may have fertile land and favorable growing conditions, or it may depend on markets and trade to supplement what it cannot produce locally.

Availability is the most visible pillar because it is the one most often associated with the concept of hunger. When harvests fail due to drought, flooding, or conflict, food availability drops. When supply chains break down, grocery shelves empty. When small-scale farmers cannot grow enough during a dry season, families go without.

This is precisely the challenge that SELF’s Solar Market Garden program was designed to address in the Kalalé District of northern Benin, West Africa. With a six-month dry season during which rainfall essentially disappears, food availability in the region collapsed every year. Subsistence farmers had no way to irrigate their fields, and communities faced predictable cycles of hunger and malnutrition.

By introducing solar-powered drip irrigation systems, SELF gave farmers the ability to grow produce year-round, not just during the rainy months. For the first time, communities had a consistent local supply of fresh vegetables regardless of the season. Food availability was transformed, not by waiting for rain, but by harnessing the sun.

Pillar Two: Access

The second of the four pillars of food security is access. Even when food is available at the national or regional level, individuals and families may still be unable to obtain it. Access encompasses both physical access, meaning whether food can be reached, and economic access, meaning whether people can afford it.

Physical access is a real barrier for communities in remote, off-grid areas. When roads are poor, markets are distant, and infrastructure is limited, food cannot easily move from where it is produced to where it is needed. Economic access is an equally serious barrier. When household incomes are low or unstable, food expenditure competes with healthcare, education, and other essential costs.

Both dimensions of access are directly tied to energy poverty. Without electricity, small-scale businesses cannot operate, refrigeration is unavailable, and income-generating opportunities are severely limited. Communities that lack energy tend to lack economic resilience, which makes consistent food access difficult to sustain.

SELF’s approach addresses this by pairing food production initiatives with broader economic empowerment. When women in Benin’s farming cooperatives began growing and selling surplus produce from their Solar Market Gardens, they gained income that they reinvested in their households. As Ms. Ganigui Guera, president of a women’s farming cooperative in Dunkassa, shared, the gardens gave her community the ability to earn money to pay school fees and medical treatment. Access to food improved because access to income improved. The two are inseparable.

Pillar Three: Utilization

The third pillar focuses on whether food, once accessed, can actually nourish the people who consume it. Utilization refers to the biological use of food by the body, which depends on several factors: the nutritional quality and diversity of the food being consumed, access to clean water, sanitation, and hygiene practices, and the overall health of the individual consuming the food.

A person can have access to food and still be malnourished. If their diet consists primarily of a single staple crop with little protein or micronutrient content, they may be consuming enough calories but not enough nutrition. If the water used to prepare food is contaminated, illness follows. If a child is sick with a preventable disease, their body cannot absorb nutrients effectively even when nutritious food is available.

This is why SELF’s work does not stop at food production. Our projects integrate water access, sanitation infrastructure, healthcare, and education alongside agricultural interventions. In Benin, the broader village electrification initiative that accompanied the Solar Market Gardens included solar-powered water pumping stations, electrification of health clinics, and improvements to local infrastructure. Each element supported the others. Children who are healthy and well-nourished attend school more regularly. Families with clean water and healthcare can focus on farming and earning. Utilization improves when the entire ecosystem of community health improves alongside it.

The Solar Market Gardens themselves contributed directly to nutritional utilization by expanding the variety of crops that farmers could grow. A diverse garden means a more nutritious diet, not just more calories.

Pillar Four: Stability

The fourth pillar is stability, and it may be the most difficult to achieve. Stability refers to the consistency of food security over time. A community that is food secure today but faces predictable seasonal hunger, recurring drought, or economic shocks that periodically disrupt access has not achieved true food security. It has achieved something fragile.

Stability requires that all three of the previous pillars, availability, access, and utilization, remain intact across time and in the face of shocks. Climate change is one of the greatest threats to stability that communities around the world face today. Shifting rainfall patterns, prolonged dry seasons, and increasingly severe weather events are disrupting agricultural production in the regions where food insecurity is already most acute.

Communities that depend entirely on seasonal rainfall for their food supply are among the most exposed to this instability. A single failed rainy season can erase months of farming effort, depleting household food stocks and income at the same time. Recovery from such shocks, without external support or productive technology, can take years.

This is where solar-powered agriculture offers something transformative. By providing a reliable, renewable energy source for irrigation, solar technology decouples food production from the variability of rainfall. Farmers in the Kalalé District who previously lost their entire dry-season harvest now grow crops year-round. That consistency is the foundation of stability.

A Stanford University study of SELF’s Solar Market Garden program confirmed what communities on the ground were already experiencing. The model was found to be cost-effective and to have significant positive impacts across the community, including measurable improvements in food production and income stability.

Why All Four Pillars Must Work Together

The food security four pillars are interdependent. Availability without access means food exists but people cannot reach or afford it. Access without utilization means people can obtain food but cannot be nourished by it. Availability, access, and utilization without stability means a community cycles in and out of food security depending on the season or the weather. True food security requires all four pillars standing firmly at once.

This is why addressing food insecurity demands integrated solutions rather than isolated interventions. Delivering food aid meets immediate availability needs but does not build long-term stability. Improving agricultural productivity supports availability but only makes a difference if families can also access the food and health services needed to utilize it well. The challenge is systemic, and the response must be too.

The Role of Energy in Food Security

One of the lessons SELF has learned across more than three decades of work is that energy access is a prerequisite for food security. Without electricity, farmers cannot pump water for irrigation, food cannot be refrigerated to prevent spoilage, markets cannot function after dark, and the economic activity that enables food access cannot take hold.

Energy poverty and food insecurity are deeply intertwined. The communities that lack reliable electricity are overwhelmingly the same communities that face chronic food insecurity. This is not a coincidence. It reflects the way that energy underpins every pillar of the food security framework.

Solar energy, applied thoughtfully and in genuine partnership with communities, can strengthen all four pillars simultaneously. It improves availability by enabling year-round crop production. It improves access by generating income for farming households. It supports utilization by powering water systems and health clinics. And it builds stability by reducing dependence on rainfall and fossil fuels.

Building Food Security Through Solar

At SELF, we believe that food security and energy access are two sides of the same coin. Our Solar Market Garden program is one of the clearest expressions of that belief. Across the villages of northern Benin, women’s farming cooperatives have turned sun and soil into reliable, self-sustaining food production that communities own and control themselves.

Food security is achievable. The four pillars framework gives us a clear way to understand what it requires and where the gaps are. Solar energy gives communities one of the most powerful tools available for filling those gaps. With the right investment and the right partnerships, we can help communities around the world build food security that lasts.