Written in British English. Did you know that a quarter of all mammals, half of all insects and reptiles, and nearly three-quarters of all flowering plants are endangered? Some scientists predict that, if we do nothing, half of all species alive today will be extinct by 2100. This book looks at the many animals and plants that have become endangered through hunting, poaching, pollution, habitat loss, and climate change. It also discusses the steps conservationists are taking to protect threatened species.