In matters relating to the environment, the United Nations Conference on Environment and Development, held in June 1992 in Rio de Janeiro, produced an “ Earth Charter”, or declaration of basic principles for the conduct of nations and peoples with respect to environment and development; agreements on specific legal measures, including conventions （公约）on climate change and biodiversity, and principles for a framework agreement on forests; and an agenda for action （ “Agenda 21”）, establishing the environmental work program agreed by the international community for the period beyond 1992 and into the twenty-first century.
在有关环境问题上，联合国环境与发展会议于1992年6月在里约热内卢举行，制定了“地球宪章”，换言之，宣布了各个国家和各个民族在环境和发展方面的基本行为准则；就具体的法律措施达成了协议，包括气候变化和生物多样性公约和关于森林框架协议的准则；还制定了一个行动议程，确定了被国际社会认可的，从1992年以后到进入21世纪期间内的环境工作方案。
