We live in a world threatened by the loss of one of humanity's greatest treasures--it's linguistic heritage. But few realize that bound up with the loss of language is loss of knowledge about our environment. This book documents the complex interrelationships between the Earth's linguistic, cultural and biological diversity. It offers a general introduction to a complex field and outlines some of the key challenges facing sustainable development from cultural and educational perspectives. 'We need more than ever to find ways to share and maintain this world of diversity in which languages, cultures and environments are mutually supporting and sustainable. '