Description In 2018, three species of birds went extinct. These species are gone forever, and many more species of plants and animals are in danger of going extinct every year. Scientists estimate that almost half of the species on Earth could be extinct by 2050. This title looks at the issue of endangered species and the impact that human activity has on the many plants and animals that share our planet. Colorful photographs, primary sources, and helpful graphics illustrate the conservation efforts made by scientists and lawmakers around the world, and the text encourages young readers to take an active role in solving this problem.