Solar panels in mountains David McNew/Getty Images

唾手可得的气候成果

纽约——下个月,1989年臭氧层消耗物质蒙特利尔议定书的签署国将齐聚卢旺达首都基加利审议一份协议修正案,以逐渐减少、乃至最终消除氢氟碳化物(HFC)的使用。氢氟碳化物现为六大主要温室气体之一,在世界各地的空调和制冷系统中得到普遍应用。

该修正案无疑是可持续发展的福音,到2050年可以防止高达1000-2000吨改变气候的气体被排放到空气中。仅此一项,世界就足以完成2015年12月巴黎气候协定所设立的全球变暖2摄氏度目标四分之一的任务。

蒙特利尔议定书的目的是修复臭氧层,后者为地球上所有生物免受紫外线的致命伤害提供了保护。到目前为止,这项工作取得了了不起的成功,过去三十年来共有近100种破坏臭氧层的化学物质逐步停止使用。臭氧层正在恢复,最新预测显示,到2065年臭氧层可能恢复如初,从而节约数万亿美元的全球医疗和农业开支。

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