Earth has a vast array of plants, animals, and ecosystems. But over the course of centuries, the natural world has been damaged by climate change, pollution, and energy extraction. Human activity is at the core of several of these environmental issues, and many activists, organizations, and scientists are searching for ways to address these challenges. Protecting Our Planet examines the science and history behind threats to the environment. It discusses ways that people are taking action today, spotlighting prominent activists from around the world and showing how everyday people can get involved. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.