Once 'green' was just a colour. Now we use it to talk about a way of looking at our world and thinking about the environment. But how green is our planet today?From nuclear power plants to Nemo the clownfish, from polar bears to pesticides, from Greenpeace to global warming, this book brings together many different stories that have made environmental history.Read it, and perhaps you too can help to make our planet greener!Four-level graded readers series, perfect for reading practice and language skills development at upper-primary and lower-secondary levels.Dominoes is a full-colour, interactive readers series that offers students a fun reading experience while building their language skills. With integrated activities, an interactive MultiROM, and exciting, fully dramatized audio for every story, the new edition of the series makes reading motivating for students while making it easy for you to develop their reading and language skills.