Roadmap for achieving net-zero emissions in global food systems by 2050.

Autor: Costa C Jr; The Alliance of Bioversity International and CIAT-Multifunctional Landscapes, Cali, Colombia. c.costajr@cgiar.org.; The Alliance of Bioversity International and CIAT-Sustainable Finance, Cali, Colombia. c.costajr@cgiar.org., Wollenberg E; The Alliance of Bioversity International and CIAT-Multifunctional Landscapes, Cali, Colombia.; Gund Institute for Environment, University of Vermont, Burlington, VT, USA.; Clim-Eat, Wageningen, The Netherlands., Benitez M; responsAbility Investments AG, Zurich, Switzerland., Newman R; The Alliance of Bioversity International and CIAT-Sustainable Finance, Cali, Colombia., Gardner N; U.S. Dairy Export Council, Arlington, VA, USA., Bellone F; UNFCCC Climate Champions, Bonn, Germany.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Sep 05; Vol. 12 (1), pp. 15064. Date of Electronic Publication: 2022 Sep 05.
DOI: 10.1038/s41598-022-18601-1
Abstrakt: Food systems (FSs) emit ~ 20 GtCO 2 e/y (~ 35% of global greenhouse gas emissions). This level tends to raise given the expected increases in food demands, which may threaten global climate targets. Through a rapid assessment, evaluating 60+ scenarios based on existing low-emission and carbon sequestration practices, we estimate that intensifying FSs could reduce its emissions from 21.4 to - 2.0 GtCO 2 e/y and address increasing food demands without relying on carbon offsets (e.g., related to afforestation and reforestation programs). However, given historical trends and regional contexts, a more diverse portfolio of practices, including diet shifts and new-horizon technologies, will be needed to increase the feasibility of achieving net-zero FSs. One likely pathway consists of implementing practices that shift food production to the 30th-percentile of least emission-intensive FSs (~ 45% emissions reduction), sequester carbon at 50% of its potential (~ 5 GtCO 2 e/y) and adopt diet shifts and new-horizon technologies (~ 6 GtCO 2 e/y). For a successful transition to happen, the global FSs would, in the next decade (2020s), need to implement cost-effective mitigation practices and technologies, supported by improvements in countries' governance and technical assistance, innovative financial mechanisms and research focused on making affordable technologies in the following two decades (2030-2050). This work provides options and a vision to guide global FSs to achieving net-zero by 2050.
(© 2022. The Author(s).)
Databáze: MEDLINE
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