The progressive increase of food waste in America and its environmental impact.

The progressive increase of food waste in America and its environmental impact.
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DOI:
10.1371/journal.pone.0007940
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发表时间:
2009-11-25
期刊:
影响因子:
3.7
通讯作者:
Chow CC
Chow CC
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hall KD;Guo J;Dore M;Chow CC

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食物浪费导致淡水和化石燃料的过度消耗,沿着食物分解产生的甲烷和二氧化碳排放,影响全球气候变化。在这里,我们从美国食物供应和人口消费的食物之间的差异计算全国食物浪费的能量含量。后者是使用经过验证的代谢数学模型将体重与进食量联系起来进行估计的。我们发现,自1974年以来,美国人均食物浪费逐渐增加了50%,达到每人每天1400千卡或每年150万亿千卡。食物浪费现在占淡水消费总量的四分之一以上,每年消耗13亿桶石油。
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.
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