Fulfilling the Paris Climate Agreement requires reducing rapidly the new emissions of greenhouse gases (GHGs) to reach net zero by 2050. As some anthropogenic emissions cannot be zero, to compensate them it will be necessary to remove GHGs from the atmosphere. Among possible methods, the Iron Salt Aerosol (ISA) offers new possibilities, including removal of methane and several other GHGs, as well as carbon dioxide. Several studies suggest that anthropogenic emissions of iron participate in the current primary productivity. As plans to decarbonize the world economy might also have inadvertent warming effects due to the reduction of iron emissions from fossil fuels burning, iron additions might help address this issue. ISA is different from the method known as Ocean Iron Fertilization and the differences are explained. ISA mimic natural processes and the dust which probably participated in the cooling during the ice-ages over the past million years. Still larger laboratory trials, safety and environmental impact studies and global chemical computer modeling are necessary before ISA would be ready to be trialed. Desk and laboratory studies indicate low cost, easy deployment and efficacy, all of which can be validated by future small scale field trials, a step needed before, if successful, a possible implementation at a climate-relevant scale.

要实现《巴黎气候协定》，需要迅速减少新的温室气体排放量，到2050年达到净零排放。由于某些人为排放量不能为零，要对其进行补偿，必须从大气中清除温室气体。在多种可能的方法中，铁盐气雾剂（ISA）提供了新的可能性，包括去除甲烷和几种其他温室气体以及二氧化碳。多项研究表明，人为排放的铁参与了当前的初级生产力。由于减少化石燃料燃烧所产生的铁排放，世界经济脱碳计划也可能会造成无意的升温效应，因此添加铁可能有助于解决这一问题。ISA与称为“海洋铁肥”的方法不同，并解释了它们之间的差异。ISA模拟了过去一百万年的自然过程和可能参与冰河时期冷却的灰尘。在准备进行ISA之前，还需要进行更大的实验室试验，安全和环境影响研究以及全球化学计算机建模。案头和实验室研究表明成本低，易于部署和功效，所有这些都可以通过未来的小规模现场试验来验证，如果成功，则需要在与气候相关的规模上成功实施之前需要采取的步骤。