What do the first national parks, tackling the ozone hole, and school strikes for climate change each have in common? They are all fantastic ideas created by humans to protect Earth and the beautiful natural world within it! Humans have made huge progress in their plans to protect and conserve the planet and its resources. In this volume, readers are guided by full-color photographs and accessible text through the most influential environmental ideas and inventions of the past 100 years. They are invited to explore different people, projects, and approaches that have helped to heal our planet.