With information on problems both large and small, Chelsea Clinton breaks down the concepts of health, hunger, climate change, endangered species and bullying, so that readers can understand the world around them, and how they can make a difference in their own lives, as well as in their communities and the world at large.

Includes index.

Water, weather and why we don't drink our poop -- Rhino horns and tiger teeth aren't magical -- Hearts, lung and why we should all wash our hands -- Food, hunger and why vitamins are awesome --Bullies, friends and anyone can be an ally.