When the land gets sick, so do we 

Land degradation and drought are fueling a hidden health crisis – but we still have time to act. 

When we speak of desertification or drought, we often think of dry rivers, cracked soil and failed harvests. But there is another, less visible toll - one that strikes deep into the lungs, hearts and daily lives of the world’s most vulnerable people. A new policy brief from the UNCCD reveals the far-reaching health impacts of land degradation and drought — and it delivers a stark message: the health of the planet and the health of people are inseparable. 

Around the world, land is deteriorating at an alarming pace. Between 2015 and 2019, more than 100 million hectares of productive land were lost each year. That’s an area roughly the size of Egypt — gone annually. This degradation doesn’t just threaten biodiversity and food production. It destabilizes communities, weakens immune systems and increases the spread of disease. The damage is particularly acute in regions like sub-Saharan Africa, Latin America and Southeast Asia, where fragile ecosystems support large and growing populations. As land dries out or is stripped of its fertility, the impact cascades: water becomes scarce, crops fail, dust storms multiply and health systems buckle under the strain. 

And the data is clear. In drylands — which already cover more than 40 per cent of the Earth’s surface — rates of malnutrition, respiratory illness and waterborne disease are rising. Children are particularly at risk. Malnutrition, stunting and underweight are now among the top drivers of childhood disease burden globally.  

In places like Zambia, droughts have pushed up food prices, leaving pregnant mothers undernourished and babies born weaker.  

In parts of South America, dust from degraded soil increases the risk of respiratory illness and exposure to infectious diseases. In Australia, prolonged drought has been linked to rising levels of anxiety, depression and rural suicide. 

This is not a coincidence. These are complex, systemic failures driven by the intertwined forces of environmental degradation and climate change. The UNCCD brief lays out how drought, land degradation and desertification — collectively referred to as DLDD — contribute to a spectrum of public health challenges, ranging from infectious diseases like cholera, malaria and even HIV, to chronic conditions such as asthma and cardiovascular disease. Poor air quality from wildfires and sandstorms, unsafe water due to reduced availability and contamination and disrupted food systems all contribute to rising illness and mortality. 

What’s more, DLDD increases the risk of emerging zoonotic diseases — illnesses transmitted from animals to humans — by disturbing ecosystems and bringing humans into closer contact with disease reservoirs. This is how Ebola spreads. This is how pandemics begin. 

It’s critical that we connect the dots: land degradation, desertification, and drought are not just environmental issues — they directly impact human health,” says Dr. Barron Joseph Orr, UNCCD Chief Scientist.  “The good news is that by restoring land and managing drought proactively, we can reduce health risks, strengthen communities and improve lives."

The solution, the brief argues, lies in breaking these dangerous feedback loops. This requires more than restoring land or investing in health. It demands a radical rethinking of how we govern the relationship between ecosystems and wellbeing. The UNCCD calls for integrated, cross-sectoral responses — ones that recognize land not as a passive backdrop to human life, but as a living, dynamic system on which health depends. 

That means reorienting land use planning, agricultural policies and environmental management to include health as a central concern. It means empowering communities with tools and knowledge to respond to climate threats. It means supporting women and girls, who often carry the greatest burdens — collecting water, caring for the sick, or suffering silently from the physical and mental toll of degraded environments. 

“We have to realize that human health is closely linked with the health of our land and our ecosystems. The quality of the food we produce from healthy soil is akin to a pharmacy. says Ibrahim Thiaw, Executive Secretary of the UNCCD. 

"This is a call to all sectors — from health to agriculture to finance — to come together and build resilience where it matters most: in our soil, in our systems, and in our communities.” 

The brief also emphasizes the need to implement the World Health Organization’s Global Action Plan on Climate Change and Health and to strengthen the One Health approach — which sees the health of people, animals and ecosystems as deeply interlinked. The benefits of action far outweigh the costs, the brief stresses. From reduced hospital admissions to increased agricultural resilience, the returns on investing in land-health synergy are profound. 

Time, however, is running short. As climate extremes intensify and drylands expand, more communities will be pushed beyond their coping capacity. Unless we act, the health consequences of inaction will grow — quietly, inexorably and with devastating effects. 

The UNCCD stands ready to support countries in this effort — by providing the data, guidance and partnerships needed to develop integrated responses, empower the most vulnerable and restore the health of the land so that people, too, can thrive. 

Because when the land gets sick, so do we.