Waring Rob: Polar Bears in Trouble
(fb2, 24 страницы, 116 Kb)
Жанр: Heinle/Cengage Learn
Издательство: Heinle/Cengage Learn, 2009
Polar bears one of the largest and most dangerous hunters in the cold regions of the North. Their bodies are built for winter and they do best in the coldest areas. Unfortunately, polar bears are becoming threatened due to changes in the world's climate. How does global warming affect polar bears? What must be done to save them?