Humanity's ecological footprint is expanding at an alarming page. With climate change, increases in human population and consumption levels, and other anthropogenic factors, nearly half the known species on Earth could soon be gone. The near collapse of entire ecosystems has already occurred. We are facing a huge sustainability issue. This Encyclopedia, in 3 volumes, proposes a global synthesis detailing the world's imperiled species and ecosystems. It documents rarity and endangerment, the major drivers of loss, areas of conservation importance, and implementation strategies to save and restore imperiled species and ecosystems. It is a first of its kind coverage of Earth's imperiled species and ecosystems in one comprehensive encyclopedia. Comprehensive - First of its kind coverage of Earth's imperiled species and ecosystems in one source, including recommendations for sustainability and conservation Global appeal - Includes global and regional applications with an emphasis on the integration of biology, geography, and land-use Reader-friendly - Top notch scientific articles written in easy-to-understand language and including strong visual graphics