Our Living World takes young readers on a fascinating tour of Earth's major ecosystems. Kids will learn about the key plants and animals that make each ecosystem unique. They'll also get a glimpse of humanity's effects, both positive and negative, on the habitats of countless creatures. Informative sidebars, suggested activities, and supplemental reference materials throughout the text contribute to a well-rounded portrait of our world's natural wonders....

Describes marine environments, wildlife, and humans' changing relationship with the oceans, and explores such topics as ocean currents, coral reefs, marine wildlife migrations, and ocean pollution.

Discusses the world's oceans, the animals that live in them, and the threats they face from overfishing, pollution, and global warming.