Short- and long-term warming effects of methane may affect the cost-effectiveness of mitigation policies and benefits of low-meat diets
2021
PEREZ DOMINGUEZ Ignacio | DEL PRADO Agustin | MITTENZWEI Klaus | HRISTOV Jordan | FRANK Stefan | TABEAU Andrzej | WITZKE Peter | HAVLIK Petr | VAN MEIJL Hans | LYNCH John | STEHFEST Elke | PARDO Guillermo | BARREIRO HURLE Jesus | LEVIN-KOOPMAN Jason | SANZ SANCHEZ Maria
Methane’s short atmospheric life has important implications for the design of global climate change mitigation policies in agriculture. Three different agricultural economic models are used to explore how short- and long-term warming effects of methane can affect the cost-effectiveness of mitigation policies and dietary transitions. Results show that the choice of a particular metric for methane’s warming potential is key to determine optimal mitigation options, with metrics based on shorter-term impacts leading to greater overall emission reduction. Also, the promotion of low-meat diets is more effective at reducing greenhouse gas emissions compared to carbon pricing when mitigation policies are based on metrics that reflect methane’s long-term behaviour. A combination of stringent mitigation measures and dietary changes could achieve substantial emission reduction levels, helping reverse the contribution of agriculture to global warming.
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