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美国土地部门减排投资和排放影响

Alice Favero¹, Christopher M Wade², Yongxia Cai²

¹RTI International, Center for Applied Economics and Strategy, Durham, NC, USA. afavero@rti.org.

Nature communications

|November 7, 2024

概括

每年投资24亿美元用于美国陆地活动,可以每年减少80万二氧化碳的温室气体 (GHG) 排放量. 最佳投资优先考虑林业和玉米带,而有限的资金限制了缓解潜力.

科学领域:

环境经济学环境经济学
气候变化缓解缓解气候变化缓解
土地使用政策土地使用政策

背景情况:

美国土地部门对于实现国家温室气体 (GHG) 减排目标至关重要.
需要有效的战略来增强碳捕获和减少陆地活动的排放.

研究的目的:

量化不同投资水平对美国陆地气候变化减缓活动的影响.
确定最佳的分配策略,通过林业和农业部门最大限度地减少排放.

主要方法:

利用动态经济模型模拟美国11个地区的土地使用部门.
纳入了26个不同的林业和农业减缓战略.
分析了不同投资场景的影响和政策实施时间.

主要成果:

每年24亿美元的投资可以实现每年约8000万二氧化碳当量 (MtCO2e) 的减排.
最佳的投资配置有利于林业部门和玉米带地区.
限制符合资格的活动,比如只专注于24亿美元的农业,可以减少48%的缓解.

结论:

为了实现美国的气候目标,对陆地缓解的战略和全面投资至关重要.
政策实施的时机显著影响了成本效益和整体减排水平.
在符合条件的土地活动中进行多样化的投资最大限度地提高了缓解潜力.

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