Changes in meat consumption can improve groundwater quality.
Yang Zhan1,2,3, Zhilin Guo4,5, Joel Podgorski6
1State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Contamination Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China.
Nature Food
|June 13, 2025
Summary
Shifting 10% of meat consumption to alternatives can significantly reduce environmental impact. This dietary change lessens nitrogen fertilizer, manure, and water use, potentially decreasing groundwater nitrate pollution risks.
Area of Science:
- Environmental Science
- Agricultural Science
- Water Resource Management
Background:
- Large-scale livestock production is a major source of environmental pollution, particularly groundwater contamination.
- Nitrate contamination in groundwater poses risks to ecosystems and human health.
Purpose of the Study:
- To assess the impact of traditional meat production on US groundwater nitrate levels (1985-2020).
- To evaluate how substituting conventional meat with alternatives affects groundwater quality.
Main Methods:
- Analysis of nitrate contamination in contiguous USA groundwater.
- Modeling the environmental footprint (nitrogen fertilizer, manure, water) of meat production.
- Simulating the impact of dietary shifts towards alternative meats.
Main Results:
- Substituting 10% of conventional meat with alternatives reduces nitrogen fertilizer by 3.4%, manure by 10.7%, and water footprint by 4.5%.
- This dietary shift can decrease the risk of groundwater nitrate exceedance by up to 20%.
Conclusions:
- Dietary shifts towards meat alternatives offer a viable strategy to mitigate groundwater pollution.
- These changes support Sustainable Development Goal 6 (Clean Water and Sanitation).
- Long-term dietary modifications can contribute to broader environmental sustainability goals.
