Who is the theme of the 2012 World Wetlands Day, Water Day, Meteorological Day, Earth Day, Environment Day, and Desertification and Drought Prevention Day?

Wetlands, forests and oceans are among the three major ecosystems in the world, and are known as the "kidneys of the earth", "natural reservoirs" and "natural species reservoirs". In order to strengthen the protection and utilization of wetlands, on February 2, 1971, representatives from 18 countries signed the Convention on Wetlands of International Importance, Especially as Waterfowl Habitat, in Ramsar, a small coastal town in southern Iran. In order to commemorate this initiative and raise public awareness of wetland protection, the 19th meeting of the Standing Committee of the Ramsar Convention in 1996 decided to designate February 2 every year as World Wetlands Day from 1997 onwards.

"World Meteorological Day", also known as "International Meteorological Day", is the anniversary of the founding of the World Meteorological Organization and falls on March 23 every year. The World Meteorological Organization was established to commemorate the establishment of the World Meteorological Organization and the entry into force of the Convention of the International Meteorological Organization (March 23, 1950). Every year "World Meteorological Day" determines a theme, requiring member states to hold celebrations on this day and widely publicize the important role of meteorological work.

World Earth Day, celebrated on April 22 every year, is a worldwide environmental protection activity. The movement was first launched in the United States in 1970 by Gaylord Nelson and Dennis Hayes, and subsequently its influence grew. In 2009, the 63rd United Nations General Assembly decided to designate April 22 each year as "World Earth Day". The event aims to arouse people's awareness of caring for the earth and protecting their homeland, promote the coordinated development of resource development and environmental protection, and thereby improve the overall environment of the earth. China has held Earth Day events on April 22 every year since the 1990s.

World Environment Day is held on June 5 every year. Its establishment reflects the understanding and attitude of people around the world towards environmental issues and expresses mankind's yearning and pursuit for a better environment. It is one of the main media through which the United Nations promotes global environmental awareness and raises government attention and action on environmental issues. The United Nations Environment Program selects a member state to hold the "World Environment Day" commemoration event on June 5 every year, publishes the "Annual Report on the Current State of the Environment" and commends the "Global 500", and based on the world's major environmental issues and environmental hot spots that year , to formulate the annual "World Environment Day" theme in a targeted manner. The theme of China's World Environment Day in 2011 is "Build an ecological civilization and enjoy a green future."

June 17, 2008 is the 14th "World Day to Combat Desertification and Drought". The theme of the 2008 World Day to Combat Desertification and Drought is "Combatting Land Degradation to Promote Sustainable Agriculture". Desertification refers to land degradation in arid, semi-arid and sub-humid arid areas caused by factors such as climate anomalies and human activities. For more than half a century, due to excessive farming, grazing and deforestation, vegetation has been destroyed and soil erosion has been serious, thus exacerbating the threat of desertification to humans. The intensification of desertification has attracted widespread attention from the international community. In 1975, the United Nations General Assembly passed a resolution calling on the world to fight desertification. In 1977, the United Nations held a World Conference on Desertification in Nairobi, the capital of Kenya, and proposed a global action program to combat desertification. On November 14, 1994, more than 100 countries, including China, signed the International Convention to Combat Desertification in Paris. In December of the same year, the 49th United Nations General Assembly, based on the recommendations of the Second Committee of the General Assembly (Economic and Financial Committee), decided to designate June 17 every year as the "World Day to Combat Desertification and Drought" starting from 1995, aiming to further Raise countries' awareness of the importance of desertification prevention and control, and arouse people's sense of responsibility and urgency in combating desertification. The United Nations General Assembly also designated 2006 as the "International Year to Combat Desertification"

This book is a case study in the "Combating Desertification" series of educational books.

This set of books was written and translated by the United Nations Educational, Scientific and Cultural Organization (UNESCO). It aims to explain that drought and desertification are global problems that require the world's common attention and efforts, which is of great significance for preventing desertification and reducing drought. . This series of books is published and distributed around the world in the six official languages ??of the United Nations, and the simplified Chinese version is part of it. Children are a group that is very receptive to new ideas, and they can serve as pioneers in combating desertification. In view of this characteristic, this set of books brings together many successful cases of desertification prevention and control around the world, as well as the United Nations' rich experience in the process of desertification prevention and control, and provides effective suggestions for areas that are threatened by desertification.