One of the ways disease spreads in developing countries is through polluted water. This topic is a serious one for young readers to understand. In this book, the issues of pollution are explained in age-appropriate detail, complete with full-color photographs of air, land, and water pollution. In addition, each engaging topic concludes with a helpful flowchart to review how acid rain works, how bacteria enter drinking water, and the ways algal blooms form. This volume is a great resource for both science and social studies students learning to understand the importance of conservation and respect for the world around us.