Human actions have had a large impact on the world around us. This series explores how people have harmed our planet in the past, and how we can make changes to protect Earth in the future. Each book includes a table of contents, one infographic, fun facts, a "You Can Help!” special feature, quiz questions, a glossary, additional resources, and an index. This Focus Readers series is at the Pioneer level, aligned to reading levels of grades 1–2 and interest levels of grades 1–3.