"SOS chigu rŭl sallija" . "Electronic books"@en . . "How to save the planet"@en . . . . . "Everywhere you look, the Earth is in danger. Air pollution. Oil spills. Acid rain. Toxic waste. The greenhouse effect. In the last few decades, your home planet has been overwhelmed by problems."@en . "지구를살리자" . . "This ebook will teach you how the Earth works and the small things you can do to keep it working properly. Whether it's by recycling or volunteering for environmental organizations, there's no end to what can be done to keep this planet healthy enough for future generations to live in."@en . . "A KIDS GUIDE TO HOW TO SAVE THE PLANET" . . "A kid's guide to how to save the planet"@en . . . . . "Juvenile works"@en . "Juvenile works" . "SOS 지구를살리자" . . . "Chigu rŭl sallija" . . . .