Age emerges as key driver of global food-related emissions
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A new study in Nature Food finds that age is a significant but overlooked driver of global food-related greenhouse gas emissions. Adolescents and young adults have the highest per capita dietary emissions, while population aging increases total emissions.
Age and Emissions Patterns
The study, led by researchers from the University of Groningen, analyzed data from 149 countries across 22 age groups between 2000 and 2019. It found that adolescents and young adults consistently have the highest per capita dietary greenhouse gas emissions globally. The increasing contribution of seniors is driven by population aging, not more carbon-intensive diets, according to lead author Yanxian Li.
Meat and Dairy Dominance
Meat and dairy remain major emission sources, especially in high-income countries. In China, rising meat consumption drove emission increases, while in India, a shift to dairy products contributed significantly. The researchers stress that reducing emissions must balance with nutritional needs, as dietary shifts in low- and middle-income countries have improved nutrition but raised emissions.
What's Next
The findings call for age-sensitive climate policies that account for life-stage differences. It remains unclear how governments will integrate such approaches into existing mitigation strategies.
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Age emerges as key driver of global food-related emissions
