Clean drinking water is a basic human ne..-阿摩線上測驗
1F Yo Yo Huang 高三上 (2012/11/02)
Clean drinking water is a basic human need. Unfortunately, more than one in six people still lack reliable access to this precious resource. The problem requires immediate attention especially in the developing world. This project examines the state of the world’s water supply and what can be done to improve it. It is divided into sections on sources, treatment, and distribution of drinking water. The sources section reveals where water is found on Earth and how such areas can be protected. The kinds of sources available also determine the types of management techniques that can be used to ma... 查看完整內容 |