When you have studied this session, you should be able to:
- Define and use correctly all of the keywords printed in bold.
- List the various ways in which water is used.
- Describe how water gets to consumers in towns.
- Identify the challenges involved in providing safe and adequate water for people in low-income countries
آخری ترمیم: جمعرات, 11 اگست 2016, 4:13 ص