Summary:

- The article discusses the lack of UN agreements on land-based geoengineering systems, which are the dominant form of geoengineering efforts to address climate change.
- While there are some international agreements on ocean-based geoengineering, such as the London Protocol, the article highlights that these do not cover the more widely used land-based approaches, which include technologies like direct air capture and carbon sequestration.
- The article emphasizes the need for more comprehensive global governance and regulation of geoengineering, as the current patchwork of agreements leaves a significant gap in addressing the dominant land-based systems.