In recent years, we have witnessed a greater understanding of the central role that nutrition plays in human development. The many manifestations of malnutrition result not just from a lack of sufficient, nutritious and safe food, but also from a host of interacting processes that link healthcare, education, sanitation and hygiene, access to resources, women’s empowerment and more. Tackling malnutrition in all its forms therefore requires co-ordinated action across a range of different sectors.
Last June, UNSCN convened an Expert Group Meeting Linking Nutrition with the SDGs to better understand the role of nutrition both as a connecting force between the Sustainable Development Goals (SDGs) and as a catalyst to their achievement. An important element discussed at the meeting, was the nexus between water, sanitation and nutrition.
Children living in environments with poor water supply, sanitation and hygiene (WASH) are more likely to be infected by disease-causing pathogens, including bacteria, viruses, and other microorganisms. These environments increase the number of undernourished and stunted children, with adverse effects on their intestinal development. According to the World Health Organization, roughly 50 percent of all malnutrition is associated with repeated diarrhoea or intestinal worm infections as a direct result of inadequate WASH. When children are undernourished, they are less resistant to infection, making them at a higher risk of mortality. Decreasing open defecation and increasing hand washing is a sound investment, simultaneously improving sanitation, and reducing the spread of disease often associated with malnutrition.
Smart water use can also contribute to more sustainable, equitable, and nutritious food systems. Agriculture is the largest user of freshwater resources, accounting for 70 percent of water use. Greater efforts are needed to promote production methods that reduce water pollution from nutrient runoff, agricultural chemicals and livestock manure. One example is the Farmhandproject in Tamil Nadu, India, where the development of a precision irrigation system in a small-scale farm, has had profound impacts: water use has reduced by 80 percent, while crop yield has increased. As mentioned in the Global Panel brief on Climate Smart Food Systems, growing a wider diversity of crops and livestock, and adopting more drought resistant varieties, can also support climate-resilient agriculture while also facilitating dietary diversity.
This growing interest in the links between food (SDG2), water (SDG6) and energy (SDG7) systems is driven by the recognition that a focus on gains in one specific area can inadvertently lead to losses in others, as well concerns about climate change (SDG13) and the negative impact of the industrial food and agricultural system on human and planetary health. These interlinkages need to be more thoroughly understood in order to make more coherent policy choices. Examples can be found in a recent publication from IWMI entitled ‘Meeting the nutrition and water targets of the Sustainable Development Goals: achieving progress through linked interventions.’ It is important that policy-makers seek out these linkages and synergies between nutrition and water.