Introduces the the theme of Sustainable Development and the Earth Charter. Read this by August 19th, when we will have a chat discussion to go through the themes. Note also, that homework related to this PowerPoint can be found from courses website, http://ecyg.wikispaces.com/YAC -> http://ecyg.wikispaces.com/Week_2 -> http://ecyg.wikispaces.com/message/list/Week_2 .