After her field trip to Camp Go Green, Hope is determined to do whatever she can to protect the environment. She pushes her family to create less waste and convinces her science club to start their own garden and compost pile. Everyone is doing their best to make good changes, but Hope just isn't sure it's enough. She wants to do even more to save the planet-before it's too late. But not everyone has time to keep up with Project Go Green. Will Hope's...

Rescued from imminent death, teens Maddy, Liam, and Sal join forces in 2001 Manhattan to correct changes in history made by other time travelers, using a "time bubble" surrounding the attack on the Twin Towers to hide their journeys.

The mischievous monkey learns about protecting the environment by planting trees and recycling paper. Includes tips on conserving energy and resources.

On Green Day at her school, Cam and her classmates discuss ways to protect the environment, but when money collected for the the school's new skylights disappears, Cam uses her photographic memory to solve the mystery.

"Holly Greenwood loves being outdoors, the color green, and -- of course -- princesses! She plays in Peterson Park almost every day. There's a jungle gym, pretty flowers, and even a special bluebird. It's her very own green kingdom. But then the mayor decides to sell the park and put buildings there instead. Holly can't let that happen! Can this princess save the day?" -- P. [4] of cover.

When Mrs. Connor's class celebrates Earth Day, Emma decides to start small by recycling, using only what she needs, and picking up trash when she goes for a walk.