World Environment Day is a celebration and a day of apprising people about the environment they are surrounded with. It is celebrated every year with a different theme on June 5 and is hosted by different cities. As part of the 2010 International Year of Biodiversity, this year's event will be celebrated under the theme - Many Species. One Planet. One Future. The global host to the event this year is 'The Land of a Thousand Hills' - Rwanda, a country of remarkably biodiversity and one who has made vast contributions to environmental protection. India is yet to host such an event.