500cities.com

To 28, the coincidence of time to make more prominent campaign, "World Water Day" theme. April 22 Earth Day April 22, 1970, by a Harvard University student Dennis initiated and organized environmental protection activities, like Xinghuoliaoyuan. The United States a total of more than 2000 people participated, about 10 000 primary and secondary schools, 2,000 colleges and universities and the
Country’s major groups to participate in this event, this day became the first Earth Day. 1972 National Conference on Human Environment held in Stockholm, United Nations Environment Programme was established in 1973, after the government environmental protection agencies and organizations around the world increasing, Earth Day, have played an important role. Therefore, Earth Day has become a global event, China
Since 1990, held every year to commemorate Earth Day campaign. May 22 International Day for Biological Diversity "Convention on Biological Diversity" on December 29, 1993 came into effect. Biological diversity refers to the life on Earth in all its forms, levels of diversity of life, including ecosystem diversity, species diversity and genetic diversity of life on Earth billions of years