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 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 twentyfirst century.
【正确答案】：1992年6月在里约热内卢召开的联合国环境与发展会议上，就有关环境的问题产生了一个“地球宪章”，换言之,宣布了各个园家和各个民族在环境与发展方面应遵循的基本行为准则,并就具体的法律措施达成了有关协议，包括气候变化和生物多样化协定,以及森林框架协议准则;此外还制定了一个行动日程表（“21世纪议程”），确定了1992 年以后直至21世纪的环境工作计划，该计划已为国际社会所认可。
