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The Progressive Increase of Food Waste in America and Its Environmental Impact

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  • Kevin D Hall
  • Juen Guo
  • Michael Dore
  • Carson C Chow

Abstract

Food waste contributes to excess consumption of freshwater and fossil fuels which, along with methane and CO2 emissions from decomposing food, impacts global climate change. Here, we calculate the energy content of nationwide food waste from the difference between the US food supply and the food consumed by the population. The latter was estimated using a validated mathematical model of metabolism relating body weight to the amount of food eaten. We found that US per capita food waste has progressively increased by ∼50% since 1974 reaching more than 1400 kcal per person per day or 150 trillion kcal per year. Food waste now accounts for more than one quarter of the total freshwater consumption and ∼300 million barrels of oil per year.

Suggested Citation

  • Kevin D Hall & Juen Guo & Michael Dore & Carson C Chow, 2009. "The Progressive Increase of Food Waste in America and Its Environmental Impact," PLOS ONE, Public Library of Science, vol. 4(11), pages 1-6, November.
    • Handle: RePEc:plo:pone00:0007940
    DOI: 10.1371/journal.pone.0007940
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    References listed on IDEAS

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