The document discusses the importance of biodiversity loss. It begins by defining biodiversity as the variety of life on Earth, including diversity within and between species and ecosystems. It then provides several examples of why biodiversity is important. Biodiversity provides ecosystem services that contribute to human well-being like food, medicine, regulation of climate and disease. Endangered species may hold undiscovered properties for important medicines. Diverse species also perform important ecological functions such as producing oxygen and regulating air and water. Biodiversity has aesthetic value and contributes to human enjoyment of nature. The interactions between biodiversity and economics are also important to consider.