With their father jailed for sinking a river boat, Noah Underwood and his younger sister, Abbey, must gather evidence that the owner of this floating casino is emptying his bilge tanks into the protected waters around their Florida Keys home.

Roy, who is new to his small Florida community, becomes involved in another boy's attempt to save a colony of burrowing owls from a proposed construction site.

New third grade teacher Mr. Granite has so many strange ideas about how to make Ella Mentary School environmentally friendly that the students are sure he must be an alien.

On Earth Day, Professor Von Drake comes to talk to Mickey and his friends about ways they can help save the planet, but everyone keeps interrupting him with suggestions of their own.

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 vandals trash McPhearson Park, Amy leads the way as she, Morgan, Carlie, Emily, and Chelsea, the newest club member, make it their project to save the spot from being turned into a parking lot and restore it to a place of beauty and fun.

Grover describes ten ways to help the world, from planting trees to recycling trash.

After Little Critter learns about Earth Day in school, he does everything he can to help protect the environment and save the polar bears from global warming, but he gets discouraged when his Climate Control Machine fails to work.

The official protector of all the unspoiled beauty in Lost Lake, Alaska, frontiersman Quinn Fortune meets his match in cheerful professor Violet Parrish who agrees to spend one month in the Alaskan wilderness in exchange for his approval on a land proposal.