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The Back-to-the-land movement started to form and ideas of environmental ethics joined with anti-Vietnam War sentiments and other political issues. These individuals lived outside normal society and started to take on some of the more radical environmental theories such as deep ecology. Around this time more mainstream environmentalism was starting to show force with the signing of the Endangered Species Act in 1973 and the formation of CITES in 1975. Significant amendments were also enacted to the United States Clean Air Act and Clean Water Act. The UN’s first major conference on international environmental issues, the United Nations Conference on the Human Environment , was held on 5–16 June 1972. It marked a turning point in the development of international environmental politics. Another milestone in the movement was the creation of Earth Day. Earth Day was first observed in SanTrending why hello sweet cheeks have a seat horse retro poster Francisco and other cities on 21 March 1970, the first day of spring. It was created to give awareness to environmental issues. On 21 March 1971, United Nations Secretary-General U Thant spoke of a spaceship Earth on Earth Day, hereby referring to the ecosystem services the earth supplies to us, and hence our obligation to protect it . Earth Day is now coordinated globally by the Earth Day Network, and is celebrated in more than 192 countries every year. Throughout the 1950s, 1960s, 1970s and beyond, photography was used to enhance public awareness of the need for protecting land and recruiting members to environmental organisations.
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