Summary/Abstract
Geoengineering, which here includes ocean iron fertilization, can be viewed in two ways: as a potential cause for further environmental harm or as an option for addressing climate change in addition to reducing greenhouse gas emissions. So far,the existing legal response in multilateral environmental agreements has been in the former domain. This article shows that this approach does not necessarily provide comprehensive legal regulation of geoengineering as it appears to leave many governance and regulatory gaps. At the same time, developing a new legal instrument on geoengineering does not seem to be feasible for a number of political and other reasons. Therefore, we propose that the most appropriate option for the time being would be to continue with the current approach but enhance inter regime cooperation and interaction.The article discusses possible formats for such regime cooperation.