This book provides an introduction into the diversity of the environmental movement through great characters in the green sector. The book describes inspiring personal achievements, and at the same time it provides readers with information regarding the history, the main directions and the ethical principles of the environmental movement. Some of the most important characters of the movement from all around the world, are included in the book. As well as the title characters, Buddha and Leonardo DiCaprio, other famous environmentalists like Albert Schweitzer, David Attenborough and Jane Goodall are discussed. Some of the less well-known but equally important environmentalists such as Chico Mendes, Bruno Manser, Henry Spira, Tom Regan or Rossano Ercolini are highlighted in the various chapters. The selection of characters represents all major branches within the green sector, ranging from medieval saints to Hollywood celebrities, from university professors to field activists, from politicians to philosophers, from ecofeminists to radicals.