Visual approach makes it easy for young children to understand major environmental issues. Simple text they can read for themselves. What is the role of carbon and how is renewable energy different Find out the answers to these questions and more. Each book includes a glossary of science words. Visual approach makes it easy for young children to understand major environmental issues. Simple text they can read for themselves. What is the role of carbon and how is renewable energy different Find out the answers to these questions and more. Each book includes a glossary of science words.