The Audio CD Pack contains a copy of the book along with an audio CD with a recording of the complete text in both British and American English. Listen and read to discover all about caring for our beautiful planet Earth... What is global warming? How can we keep our planet clean?Read and discover more about the world ¿ in English! This level is aimed at confident, high-level, young learners of English and contains 1,050 headwords.Read and discover all about caring for our beautiful planet Earth.What is global warming? How can we keep our planet clean?