Think Green series- Each title methodically explains the tough problems faced by our planet, plus solutions large and small. Each softcover book is 65 pages and contains hundreds of colourful photographs, illustrations, charts, graphs, index, glossary, and ‘Facts and Figures’ section. Features: Scientific terms are defined in context, Identical dramatic four-color covers (back cover color band identifies books that are the lower level), Teacher's Guides with reproducible activities allow students to work from either text, Glossary defines difficult terms, "Did you know?" sections contain interesting facts, End-of-book "Facts and Figures" section summarize critical information, The index takes students directly to topics of interest