WED celebration began in 1972 and has grown to become the one of the main vehicles through which the UN stimulates worldwide awareness of the environment and encourages political attention and action.

World Environment Day (WED) is an annual event that is aimed at being the biggest and most widely celebrated global day for positive environmental action. WED activities take place all year round but climax on 5 June every year, involving everyone from everywhere.

India will be for the first time ever the global host of World Environment Day 2011 (WED) on 5 June under the theme of  'Forests: Nature at Your Service.

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