It's Earth Day / 
Mercer Mayer. 
 - NEW YORK :  Scholastic,  c2008; 2011. 
 - 1 volume (unpaged):  20 cm 
<br/><br/> Lex: 540 
<br/><br/> 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. 
<br/><br/><br/>in English 
<br/><br/><label>ISBN: </label>9780545338691 
<br/><br/><label>Subjects--Personal Names: </label><br/>Little Critter (Fictitious character)--Juvenile fiction; Earth Day--Juvenile fiction; Earth Day--Fiction
<br/><br/><label>LC Class. No.: </label>M45i 2011