- Understand how the water cycle operates
- Know the causes and effects of depletion in different water reservoirs
- Understand how we can work toward solving the water supply crisis
- Understand the major kinds of water pollutants and how they degrade water quality
- Understand how we can work toward solving the crisis involving water pollution
Thumbnail image - Great Lakes from Space. The Great Lakes hold 21% of the world’s surface fresh water. Lakes are an important surface water resource.