It is April 22 and your class it outside cleaning the park. But do you know why? It's Earth Day! Turn the pages of this book to find out what causes air pollution, how a river caught fire in 1969, and what you can do to help Earth everyday.

שם הספר
Independence Day (Heinemann First Library)
Flag Day (Holiday Histories)
Veterans Day (Holiday Histories)
El Dia de Martin Luther King, Jr. / Martin Luther King Jr's Day (Historias De Fiestas / Holiday Histories) (Spanish Edition)