Classics, modern fiction, non-fiction and more. Written for secondary and adult students the Oxford Bookworms Library has seven reading levels from A1-C1 of the CEFR.It''s a terrible problem - or it''s really not as bad as people say. There will be sudden big changes - or slower changes that we can learn to live with. It means the end for many animals, people, even whole islands - or the beginning for growing food in the Sahara. What is the true story about climate change? Who is right - and what can we do about it? If we learn about the past, then perhaps there will be time to make changes for the future...