International Indigenous Populations Day This date recognizes the day on which the first meeting of the Work Group for Indigenous Populations of the Subcommission for Promotion and Protection of Human Rights took place. The objective of the International Decade es to strengthen the cooperation for solutions to problems which indigenous populations are faced with in areas such as human rights, the environment, development, education and health. The Coordinating Body of the ”Decade” is the Officer for Human Rights of the High Comissioner of the United Nations.

Tree Day Sweden was the first country in the world to institute an anuual day like ´Tree Day´. This occurred in 1840 when the importance of forrestry resources and the care which must be exercised with regards to trees was first recognized. Years later, many swedes emigrated to the United States y brought with them this valiant cultural legacy, whose example served to encourage the US to instate their own National Tree Day in 1872. And from then on, countries from around the continent and around the world began to establish their own Tree Day.

Global Day for the conservation of the Ozone Layer The Global Day for the conservation of the ozone layer is celebrated on the 16th of September, instituted by the United Nations with the objective to inform the public about this problem. Ever since 1985, the year in which the Vienna Convention for the protection of the ozone layer was adopted, which was followed in quick succession by a number of international accords, a substantial reduction in the production of CFCs (ChloroFluorocarbon Compounds) has been achieved, the compounds principally responsible for the destruction of the ozone layer.

Global No Car Day The celebration of go-without cars days, in previous years, bears civic importance and has been extended to different areas of the world. The principal objective of this day is to promote public transport as an alternative means of transport, and to raise citizens´awareness of the effects thast cars have on the environment.The dominant discourse regarding urban movement was hence change, a change which had been produced through diverse official documents from the beginning of the decade, those which alerted the public about the environmental problems brought on by cars and about the necessity to change traffic politics in cities.

International Habitat Every year the International Habitat DAy selects a different theme, which generally has to do with the habitat of human beings: the city and the home. Dealing with a recommendation made by the Commison for Human Establishment, in 1985 the Assembly designated the first monday of every October as being International Habitat Day (Resolution 40/202A) The first celebration of the day, in 1986, coinsided with the tenth anniversary of the first world conference regarding this theme- Habitat: UN Conference regarding Human Establishments (Vancouver, Canada, 1976).