ABSTRACT
This chapter examines the contemporary international legal rules and principles that apply to all geoengineering techniques. The international climate change regime and the Convention on the Prohibition of Military or Any Hostile Use of Environmental Modification Techniques are the main treaties. The concept of due diligence was discussed in 1999 by the International Law Commission in the context of the topic of prevention of transboundary damage from hazardous activities. Exchanging information is an important means of furnishing initial information to as well as updating potentially affected states with new knowledge, as well as receiving receive feedback from these states in order to control or minimize significant transboundary harm at an early stage. The 1992 Convention on Transboundary Effects of Industrial Accidents uses "serious effect" to describe "transboundary effects" resulting from industrial accident. In order to prevent materialization of significant risk that may cause significant transboundary harm, states are required to comply with procedural obligations to eliminate or minimize risks.
