This document discusses several important international declarations and principles of environmental law. It summarizes the Stockholm Declaration (1972), Rio Declaration (1992), and Johannesburg Declaration (2002) which established frameworks for environmental protection and conservation. It also outlines key principles of international environmental law like sustainable development, polluter pays, and precautionary action. Finally, it examines international responses to issues of marine pollution and global warming through conventions like the UN Law of the Sea and frameworks for reducing greenhouse gas emissions.