This document discusses various topics related to living an environmentally friendly lifestyle. It begins by outlining the main topics to be covered, including the top 5 ecological cities, eco-friendly houses, organic living, eco-friendly burials, and environmentally friendly diets. It then discusses the meaning of ecological cities and lists Copenhagen, Curitiba, San Francisco, Freiburg, and Singapore as the top 5 most ecological cities in the world, providing details on the environmental practices of each. The document also profiles some unconventional eco-friendly house designs, and discusses ways to live an organic lifestyle and eco-friendly burial options.