World Environment Day (WED) is celebrated annually on 5 June and encourages awareness and action for the protection of the environment. It is supported by many non-governmental organizations, businesses, government entities, and represents the primary United Nations outreach day supporting the environment. First held in 1973, it has been a platform for raising awareness on environmental issues as marine pollution, overpopulation, global warming, sustainable development and wildlife crime. World Environment Day is a global platform for public outreach, with participation from over 143 countries annually. Each year, the program has provided a theme and forum for businesses, non government organizations, communities, governments and celebrities to advocate environmental causes. History World Environment Day was established in 1972 by the United Nations at the Stockholm Conference on the Human Environment ( 5–16 June 1972), that had resulted from discussions on the integration of human interactions and the environment. One year later, in 1974 the first WED was held with the theme "Only One Earth". Host cities World Environment Day celebrations have been (and will be) hosted in the following cities: Annual themes and major initiatives and accomplishments For almost five decades(January 2016), World Environment Day has been raising awareness, supporting action, and driving changes for the environment. Here is a timeline of key accomplishments in WEDs' history: 2005 The theme for the 2005 World Environment Day was "Green Cities" and the slogan was "Plant for the Planet!". 2006 The topic for WED 2006 was Deserts and Desertification and the slogan was "Don't desert drylands". The slogan emphasised the importance of protecting drylands. The main international celebrations of the World Environment Day 2006 were held in Algeria. 2007 The topic for World Environment Day for 2007 was "Melting Ice – a Hot Topic?" During International Polar Year, WED 2007 focused on the effects that climate change is having on polar ecosystems and communities, on other ice- and snow-covered areas of the world, and the resulting global impacts. The main international celebrations of the WED 2007 were held in the city of Tromsø, Norway, a city north of the Arctic Circle. Egypt issued a postage stamp for the 2007 World Environment Day. 2008 The host for World Environment Day 2008 was New Zealand, with the main international celebrations scheduled for Wellington. The slogan for 2008 was "CO2, Kick the Habit! Towards a Low Carbon Economy." New Zealand was one of the first countries to