When Judy Moody gets serious about protecting the environment, her little brother Stink thinks she is overdoing it, but she manages to inspire her third grade class to undertake an award-winning, environment-saving project.
The students in Miss Fox's class lead their school in making choices to help keep the planet healthy, such as turning off lights when leaving a room, taking shorter showers, and using cloth bags instead of plastic ones.
When Brother's class studies birds, the citizens of Bear Country end up choosing sides in a battle between environmentalists and those who want to cut down the trees in Birder's Woods to build houses.