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When global warming becomes malnutrition: New study links climate change, childhood stunting and local inequality
https://news.nd.edu/news/when-global-warming-becomes-malnutrition-new-study-links-climate-change-childhood-stunting-and-local-inequality/June 09, 2026
Renée LaReau
In 2022, about 149 million children under age five worldwide suffered from childhood stunting. A critical marker of chronic undernutrition, stunting is more than a metric of physical height. It represents a lifelong constraint on human potential, carrying a heightened risk of mortality, chronic disease, impaired cognitive development and reduced economic opportunity.
A new University of Notre Dame study published in the Proceedings of the National Academy of Sciences reveals that human-caused climate change is actively worsening this public health crisis, acting alongside structural socioeconomic disparities that already challenge the next generation’s ability to thrive.
Analyzing 16 years of data from 34 African countries, researchers from Notre Dame’s Keough School of Global Affairs have found that every 1°C increase in anthropogenic (human-caused) temperature anomalies is directly linked to a 3.45 percent rise in childhood stunting. The finding highlights opportunities to reduce childhood stunting through policy interventions that address socioeconomic inequality while strengthening maternal education, sanitation and household resilience in poorer communities.
…
“We are seeing a direct physical translation of global emissions into child undernutrition. When extreme heat limits food availability and drives up prices, young children are the very first to suffer the biological consequences. Their developing brains and bodies simply do not get the fuel they need, cementing a cycle of intergenerational poverty before they even reach their fifth birthday.”
…
N. Pradhan, E. Ludwig-Borycz, & A. Agrawal, Climate change, inequality, and childhood stunting in African countries, Proc. Natl. Acad. Sci. U.S.A. 123 (23) e2518179123, https://doi.org/10.1073/pnas.2518179123 (2026).Renée LaReau
In 2022, about 149 million children under age five worldwide suffered from childhood stunting. A critical marker of chronic undernutrition, stunting is more than a metric of physical height. It represents a lifelong constraint on human potential, carrying a heightened risk of mortality, chronic disease, impaired cognitive development and reduced economic opportunity.
A new University of Notre Dame study published in the Proceedings of the National Academy of Sciences reveals that human-caused climate change is actively worsening this public health crisis, acting alongside structural socioeconomic disparities that already challenge the next generation’s ability to thrive.
❝A single degree of warming alters the foundational conditions of child survival.❞
Analyzing 16 years of data from 34 African countries, researchers from Notre Dame’s Keough School of Global Affairs have found that every 1°C increase in anthropogenic (human-caused) temperature anomalies is directly linked to a 3.45 percent rise in childhood stunting. The finding highlights opportunities to reduce childhood stunting through policy interventions that address socioeconomic inequality while strengthening maternal education, sanitation and household resilience in poorer communities.
…
“We are seeing a direct physical translation of global emissions into child undernutrition. When extreme heat limits food availability and drives up prices, young children are the very first to suffer the biological consequences. Their developing brains and bodies simply do not get the fuel they need, cementing a cycle of intergenerational poverty before they even reach their fifth birthday.”
…