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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.

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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.