是什么"safety valve"?

今天’s post is by 马克·麦克劳德环境保护部国家气候运动特别项目负责人。

有人提出了“safety valve”控制成本 总量管制与贸易政策 to fight global warming. This post explains what a 安全阀门 is, and why it provides only an illusion of cost management.

在限额与交易计划中,公司可以选择将排放降低到限额以下,或购买额外的配额。一些人担心,如果许多公司需要购买额外的配额,需求将推高价格,给企业造成不必要的负担。

的“safety valve” or “escape hatch”旨在解决这个问题。它规定,当价格达到预定的美元价值时,企业不再需要依靠市场上现有的配额供应。相反,联邦政府以指定价格出售新的配额–可能数量无限。

这种方法有两个问题:

  • A 安全阀门 destroys the cap. 的hard limit on emissions is the cornerstone of a 总量管制与贸易政策. Without a solid cap, we can’t be sure our emissions will go down enough to avoid the worst consequences of global warming. A 安全阀门 gives the illusion that we are controlling emissions while allowing more greenhouse gas pollution into the atmosphere.
  • A 安全阀门 limits the economic opportunity of those who develop cleaner technology. 较高的许可证价格表明市场需要在创新的低碳技术上进行更多投资– happy news if you’re in the business of inventing and selling ways to cut pollution. A 安全阀门 would sharply curtail incentive for innovation. This drives up costs in the long run, and discourages the development of the clean technology we need.

A 安全阀门 seriously undermines the main advantages of a cap. Its ability to control costs is an illusion, it lets more pollution into the atmosphere, and discourages entrepreneurs from investing in pollution-cutting technology.

If you have any questions about the 安全阀门, please post them, and we’我会尽力回答。

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