Why Food Is Getting Harder to Produce in a Changing Climate

Food production around the world is facing new and growing pressures. Many people watching global events are starting to ask why crops fail, why food prices keep climbing, and why farming seems more fragile than before. One core reason is that food production depends on the water-energy nexus in ways that most people do not usually see. Agriculture is not just about seeds and soil. It needs vast quantities of freshwater to grow crops. It also requires substantial amount of energy to power irrigation pumps, tractors, processing facilities, and transportation. At the same time, generating reliable energy often depends on having enough water to cool power plants. These complex relationships mean that problems in one area like water scarcity or energy disruption can quickly affect food systems everywhere. Understanding this basic but powerful reality helps explain why our global food supply is under stress in a changing climate and a growing world. According to the United Nations and major international water authorities, agriculture consumes most of the world’s freshwater resources and a significant share of energy used globally goes into food production and distribution. These resource demands are rising with population growth and changing diets, creating mounting pressure on all three systems.

Water shortages are intensifying in many areas of the world. This trend is already beginning to impact agriculture and food prices. There are documented alarming depletion levels of groundwater, as well as lake and river water. These changes are due to increasing temperature trends around the world and the changing patterns of rainfall. The result is less water available for irrigation of crops and an increasing risk of failure to achieve global food security unless efforts to address the way that water is used and managed by farmers are taken. Furthermore, recent innovative approaches to sustainable forms of agriculture demonstrate that increasing production through either increasing use of water or fertilizers will not ultimately be effective. In contrast, new research findings show that production methods reliant upon limited resources make them non-sustainable as both the supply of water decreases while at the same time the costs of energy are on the rise. One multi year analysis of agricultural systems in water stressed regions projects that traditional farming methods cannot continue without increasing ecological stress and diminishing returns. This research emphasizes that boosting productivity in such regions requires a new perspective that accounts for the interactions among water, energy and food resources rather than treating each separately which is widely known as the Water-Energy-Food nexus.

Climate change threatens food security through various impacts beyond just water shortages. As outlined in a recent United Nations report on glaciers melting, as glaciers continue to melt and reduce their size, they ultimately improve water quality by filling rivers with silt and sediment, which causes problems for both humans and nature alike. The glaciers can cause large populations of people and large amounts of agricultural land to be affected by the lack of seasonal melting to provide necessary irrigation and water for drinking. The changes associated with the melting glaciers do not occur in isolation; they are part of many other ways in which climate change is changing our climate. The changing climates are affecting multiple ways that rain and drought will increase to cause problems for farmers in producing food reliably.

At the same time, energy concerns are steadily becoming part of the conversation about food production. Rising energy costs, volatile fuel supplies and an increasing need for clean energy introduce new constraints on how farming systems can operate. In many agricultural regions, farmers are finding it more expensive to power irrigation systems and run machinery. Energy uncertainty makes it harder to plan for planting and harvest seasons. It also adds cost pressure to food processing and transport, which are essential parts of the food supply chain. Combining these pressures with water scarcity creates a triple challenge that traditional agricultural planning is not well suited to handle.

Being able to identify and describe problems is only the beginning of what researchers and practitioners do. More importantly, they are developing solutions that support a more resilient and sustainable food production system. New innovative technologies and agricultural practices that are being developed will allow for the reduced need for possible freshwater and energy use during the production of agricultural products. These new technologies will enable farmers to better conserve water by using a precision irrigation system that utilizes a variety of devices and sensors to monitor irrigation activity in real time, which will provide them with greater insight into how much water they use (as compared to traditional methods). Additionally, the use of solar-powered pumps, as well as other renewable energy sources, can help farmers reduce their dependence on fossil fuels. The use of new agricultural technologies and practices both benefits the individual farmer and creates a more sustainable farming system overall through increased resiliency and decreased demand for freshwater and energy.

According to several international organizations, the development of water governance systems, the modernization of agricultural irrigation systems, and increasing investment in agriculture infrastructure that is efficient are necessary for safeguarding food futures. All the above are going to involve collaboration between different sectors and stakeholders such as policy-makers, scientists, farmers, and community leaders. In re-thinking how to address the issues related to food production, this will also include an overview of policy and planning. By incorporating an understanding of water and energy restrictions throughout Food Systems, food systems can develop their ability to endure future events such as drought, spikes in food prices, or disruptions of supply chains. As such, agricultural policy-makers are transitioning away from an approach to policy development that is fragmented toward a more coordinated and comprehensive approach that synchronizes agricultural planning and management; the protection of water resources; and a transition to cleaner types of energy. Areas of focus for development in rural areas include: development of energy systems for rural communities; creation of incentives to develop more efficient ways to conserve water; and the development of educational materials to educate farmers on alternative methods of resource-efficient agriculture.

The lessons from recent research and global policy discussions point to one clear message. Food production cannot be separated from water and energy realities. If one of these systems falters, the others are likely to feel the impact quickly. However, integrated and holistic approaches that consider all three together can strengthen food security and build resilience against the uncertainties of climate change and population growth, helping create a more sustainable environment for future food systems. For farmers, communities and countries, the key to feeding the future with fewer resources lies in cooperation, innovation and strategic management of the resources that sustain us all.