Air pollution is no joke, but Mary Catherine's wacky treasure hunt for clean air is full of fun and humor. Readers of this engaging play will join Mary Catherine and her fellow students on a mysterious quest, answering riddles and exploring nature. They'll learn about the different causes of air pollution and how to test an environment for signs of its impact. The narrative structure makes complex concepts simple and fun. Humorous, informative, and loaded with charming illustrations, this play is the perfect introduction to the serious truth about air pollution.