Optimizing dietary habits for climate benefits in China: Greenhouse gas emissions and sustainable substitution strategies

IF 10.9 1区环境科学与生态学 Q1 ENVIRONMENTAL STUDIES

Sustainable Production and Consumption Pub Date : 2024-09-29 DOI:10.1016/j.spc.2024.09.024

Yiqiong Du , Zhe Zhao , Fan Zhang , Ziqiang Du

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Abstract

The transition in dietary patterns will impact future food consumption and greenhouse gas emissions (GHGs). In this study, we employed the Intergovernmental Panel on Climate Change (IPCC) coefficient method to evaluate the GHGs associated with dietary consumption across 31 provinces in China from 1978 to 2022. Additionally, we simulated the greenhouse gas emission reduction potential and the spatio-temporal changes under five food substitution scenarios for the period 2022–2050. The results indicated that GHGs from animal-based foods increased the most, rising from 1673.1 Mt. CO₂eq in 1978 to 6660.3 Mt. CO₂eq in 2022, with pork being the largest source of emissions, accounting for approximately 44 %. The grain-based food substitution scenario resulted in the lowest GHG emissions, about 533.88 Mt. CO₂eq. Conversely, the plant-based food substitution scenario had the highest emissions, reaching 635.49 Mt. CO₂eq. This study provides a benchmark for improving regional dietary structures and formulating policies aimed at reducing GHGs through dietary consumption.

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在中国优化饮食习惯，实现气候惠益：温室气体排放与可持续替代战略

膳食模式的转变将影响未来的食品消费和温室气体排放（GHGs）。在本研究中，我们采用政府间气候变化专门委员会（IPCC）系数法评估了 1978 年至 2022 年中国 31 个省份与膳食消费相关的温室气体排放量。此外，我们还模拟了 2022-2050 年期间五种食物替代情景下的温室气体减排潜力和时空变化。结果表明，动物性食品产生的温室气体增加最多，从1978年的1673.1百万吨二氧化碳当量增加到2022年的6660.3百万吨二氧化碳当量，其中猪肉是最大的排放源，约占44%。谷物食品替代情景的温室气体排放量最低，约为 5.3388 亿吨 CO2eq。相反，植物性食品替代方案的温室气体排放量最高，达到 635.49 兆吨二氧化碳当量。这项研究为改善地区膳食结构和制定旨在通过膳食消费减少温室气体的政策提供了基准。

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来源期刊

Sustainable Production and Consumption Environmental Science-Environmental Engineering

CiteScore

17.40

自引率

7.40%

发文量

389

审稿时长

13 days

期刊介绍： Sustainable production and consumption refers to the production and utilization of goods and services in a way that benefits society, is economically viable, and has minimal environmental impact throughout its entire lifespan. Our journal is dedicated to publishing top-notch interdisciplinary research and practical studies in this emerging field. We take a distinctive approach by examining the interplay between technology, consumption patterns, and policy to identify sustainable solutions for both production and consumption systems.