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全球思考,全球行动:中低收入国家减缓温室气体排放的机遇

Think Globally, Act Globally: Opportunities to Mitigate Greenhouse Gas Emissions in Low- and Middle-Income Countries
Journal of Economic Perspectives · 2023 · Rachel Glennerster、Seema Jayachandran

中文摘要

温室气体减排是一种全球公共品,这使得在应对这一挑战时采取全球行动是有效率的。我们提出若干理由,说明寻求减缓气候变化的高收入国家若将资源投入到中低收入国家的机会中,可能产生更大的影响。具体而言,高收入国家一些最简便、最廉价的减排选项已被利用;中低收入国家的土地和劳动力成本更低;新建绿色设施比改造为绿色设施更便宜;以及在高度一体化的经济体中,全球性目标定位至关重要。我们还讨论了经济层面的反对观点,例如在中低收入国家监测排放水平的挑战、伦理考量、不应将减缓资金重复计算为发展援助的重要性,以及可能有助于实现这一机遇的政策步骤。

Abstract

Reductions in greenhouse gas emissions are a global public good, which makes it efficient to act globally when addressing this challenge. We lay out several reasons that high-income countries seeking to mitigate climate change might have greater impact if they invest their resources in opportunities in low- and middle-income countries. Specifically, some of the easiest and cheapest options have already been tapped in high-income countries, land and labor costs are lower in low- and middle-income countries, it is cheaper to build green than to retrofit green, and global targeting matters in integrated economies. We also discuss economic counterarguments such as the challenge of monitoring emissions levels in low- and middle-income countries, ethical considerations, the importance of not double-counting mitigation funding as development aid, and policy steps that might help realize this opportunity.
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