Polar bears in trouble /
Rob Waring, series editor.
- Boston, Mass. : Heinle/Cengage Learning, [2009]
- 24 p. : col. ill., col. map ; 21 cm.
- Footprint reading library Incredible animals .
Includes vocabulary list.
9781424011124
English language--Textbooks for foreign speakers.
Global warming.
Polar bears--Climatic factors.
Readers (Elementary).
599.786 WAR/O