| April 1, 2002 | "World Environment Photo Exhibition Executive Committee" was established to hold Exhibitions of the UNEP "Focus on Your World" International Photographic Competition on the Environment in Asian countries. |
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| November 25, 2002 | Contract was made for holding the Exhibition in China with the Center for Environmental Education & Communications of State Environmental Protection Administration of China. |
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| April 15-21, 2003 | The Exhibition was held at Beijng Shi Ji Tan Exhibition Hall. |
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| September, 2003 | In cooperation with the Tokyo Metropolitan Government and the Tokyo Junior Chamber, the Exhibtion was held at the Tokyo Metropolitan Government Office, as the first step of holding a series of Exhibitions in Japan. |
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| January 5-11, 2004 | In cooperation with NPO Laboratory of Image Culture Okinawa, the Exhibition was held at Kumoji Public Hall, Naha, Okinawa. |
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| January 9-25, 2004 | In cooperation with the Omori Corporate Taxpayer's Associations, which has 1.32 million corporate members nationwide, the Exhibition was held at Ota Forest of Culture Hall, Tokyo. This led the potential of holding the photo exhibitions across the country thereafter. |
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| February 24, 2004 | World Environment Photo Exhibition Executive Committee was registered by the Tokyo Metroportan Government as "NPO World Environment Photo Exhibition." |
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| July 3-11, 2004 | NPO World Environment Photo Exhibition, by itself for the first time, held an Exhibition at the National Museum of Emerging Science and Innovation. |
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| July 9-16, 2004 | In cooperation with the Department of Environmental Quality Promotion of Thai Government, the Exhibition was held at the buiding of the Department of Environmental Quality Promotion in Bangkok. This led to succeeding exhibitions in Thailand. |
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| December 5-9, 2004 | In cooperation with District 3750 Rotary International, the first Exhibition in South Korea was held at Ansan Culture and Arts Center at Ansan City. |
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| June, 2005 | Under a formal authorization by UNEP, the first volumes of the Japanese versions of UNEP's official magazines, Our Planet and TUNZA, were published. The two magazines are to be published quarterly, which amount to a total of eight issues per year.
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| 29 July, 2005 | NPO World Environment Photo Exhibition changed its organization name to NPO Associates of the Earth. This change was certified by Tokyo Metropolitan Government. |
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| February, 2006 | UNEP publication Japanese version site was launched under www.ourplanet.jp. |
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| May 17-June 5, 2007 | Environmental Photo Exhibitions at 7 International Airports were successfully held under the title as "Exhibitions of the UNEP 'Focus on Your World' International Photographic Competition on the Environment at International Airports" which draws media's attention internationally.
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| November 2007 | The first "Window on UNEP Information and Events" was opened at Tokyo Big Sight. It displays pictures and videos on the environment owned by UNEP. |
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| May 22-June 29, 2008 | Environmental Photo Exhibitions at 7 International Airports were successfully held under the title as "Exhibitions of the UNEP 'Focus on Your World' International Photographic Competition on the Environment at International Airports" which draws media's attention internationally. |
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| September, 2008 | 2nd permanent "Window on UNEP Information and Events" was opened at Makuhari Messe (Chiba). |
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| October, 2008 | 3rd permanent "Window on UNEP Information and Events" was opened at Center for Environmental Science in Saitama. |
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| March, 2009 | 4th permanent "Window on UNEP Information and Events" was opened at Hyogo Hands-on Ecology Center in Hyogo, and 5th permanent "Window on UNEP Information and Events" was opened at Naha Airport in Okinawa. |
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| May, 2009 | 6th permanent "Window on UNEP Information and Events" was opened at Environment Learning Center in Nagoya City (ECOPAL Nagoya, Aichi). |
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| May 22-August 10, 2009 | UNEP Global Environment Information display in airport 2009 was held at 8 airports including three airports for the first time in Philippines. (Japan: Narita Int'l Airport, Haneda Airport, Chubu Int'l Airport, New Chitose Airport, Naha Airport/Philippines: Manila Int'l Airport, Davao Int'l Airport, Mactan Cebu Int'l Airport) |
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| February 10, 2010 | AOE was moved and succeeded to a General Incorporated Foundation. |
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| June, 2010 | 7th permanent "Window on UNEP Information and Events" was opened at Eco House 138 in Ichinomiya city, Aichi. |
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| October, 2010 | 8th permanent "Window on UNEP Information and Events" was opened at Ginza TS Building, Chuo-ku, Tokyo (Now-closed). |
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| February 1, 2011 | AOE was certified by Cabinet Office as a Public Interest Incorporated Foundation. |
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| March 12, 2012 | AOE attended the 2nd Asia-Pacific Climate Change Adaptation Forum in Bangkok for the first time. |
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| March 23, 2013 | First UNEP Global Environment Information Display in Micronesia was held. |
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| May, 2015 | Human Education Project newly started. |
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| July, 2017 | Apply for registration to the Japan Anniversary Association on October 1st every year as "WA-NO-HI",
and receive formal registration from the association.
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