An agreement between two nations is called a bilateral environmental agreement. When the agreement is concluded between three or more nations, it is called a multilateral environmental agreement (MEA). These agreements, concluded mainly by the United Nations, concern issues such as atmospheric policy, freshwater policy, waste and hazardous substances policy, the marine environment, nature protection policy, noise pollution and nuclear safety.  Priorities, please! UNEP and the search for global sustainability Bauer, Steffen / Carmen Richerzhagen The current chronicle of 18 February 2013 The use of multilateral environmental agreements began in 1857, when a German agreement regulated the flow of water from Lake Constance to Austria and Switzerland.  International environmental protocols were adopted as part of environmental policy, after transboundary environmental problems were largely taken into account in the 1960s.  From 7 to 17 The annual United Nations High-Level Political Forum (HLPF) will take place virtually on 27 July 2020. The debates are under the particular influence of the global fight against Covid-19. The SDGs are at the heart of the 2030 Agenda for Sustainable Development. Adopted by the United Nations General Assembly in September 2015, it takes into account for the first time the three dimensions of sustainability: social issues, the environment and the economy. The ambitions of the 2030 Agenda are universal and therefore apply equally to all countries. . .