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气候政策承诺如何影响能源系统和美国各州的经济
Parrish Bergquist1, Christopher Warshaw2
1Department of Political Science, University of Pennsylvania, Philadelphia, PA, USA. pberg@upenn.edu.
Nature communications
|August 10, 2023
概括
国家气候政策显著减少二氧化碳排放,没有经济损害的证据. 然而,目前的努力不足以实现"巴黎协定"下的美国气候目标.
科学领域:
- 环境政策 环境政策
- 气候变化的经济学
- 国家级治理治理国家级治理
背景情况:
- 州政府是美国减缓气候变化的主要参与者.
- 缺乏全面衡量国家气候政策有效性的方法.
- 评估政策影响需要一个整体的观点超越单个法规.
研究的目的:
- 制定国家气候政策 (2000-2020) 的综合指数.
- 分析国家气候政策对环境和经济的影响.
- 评估国家一级气候行动的整体影响.
主要方法:
- 收集了来自25个个别州政策的数据.
- 构建了一个综合的国家气候政策指数.
- 研究了政策指数和排放/经济数据之间的相关性.
主要成果:
- 气候政策指数的标准偏差增加与人均电力部门二氧化碳排放量减少5%相关.
- 全经济人均二氧化碳排放量减少2%与气候政策的严格性增加有关.
- 没有证据表明严格的气候政策与各州的负面经济结果有关.
结论:
- 国家气候政策显示出有形的环境效益,减少二氧化碳排放.
- 强有力的国家气候政策不会对经济表现产生负面影响.
- 目前的州级气候行动不足以实现美国在"巴黎气候协议"下的承诺.
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