Biological diversity is the abundance of different species living in a particular region; a natural area composed of a community of plants, animals and other living things in a particular physical and chemical environment, according to biodiversity.ca.gov. a natural area consisting of a community of plants, animals and other living things in a physical environment and ... Biodiversity is practiced to maintain the diversity of species in each ecosystem, so we plan for human activities that affect land use and natural resources. Since everything lives in ecosystems, including humans, every species of vegetation and every creature has a vital role on earth and in the circle of life, biodiversity helps increase the productivity of ecosystems. Species depend on each other for services provided by other species to ensure their survival. Human activity causes mass extinctions in the environment (Millennium Ecosystem Assessment, 2005). Ten to 30% of mammal, bird and amphibian species are threatened with extinction, due to human actions, and over the years this number has increased. ExtinctionHabitat loss and degradation, climate change, excessive nutrient loading, and other forms of pollution all play a significant role in the threat of animal extinction, as does the trade in animals and their parts animals. Although this plays an important role for some species, it is not generally recognized as a major source of animal extinction. The animal trade is diverse, ranging from live animals to a wide variety of wildlife products derived from them, such as food products and exotic leather goods. The main reason for trade in animals lies in their economic value, ranging from local income to main profit...... middle of paper ......uction, is the wildlife trade. The most obvious problem with the wildlife trade is overexploitation, to the point where survival of a species is rare. Such overexploitation has caused extinctions or endangered species, and as the human population increases, the demand for wildlife has increased. Overexploitation should concern us all, because wildlife is vital to a large part of the world's population, often the poorest. Rural households rely on local wild animals for meat protein and some regions rely on them for traditional medicine used around the world. It also harms the balance of nature. These species keep the world running, and humans depend on a functioning Earth to survive. It is necessary to be careful and thoughtful about wildlife species and their habitats to avoid not only extinctions, but also serious damage to the complex web of life..