If you get to the water, the sides of your hole keep falling in. You're getting tired of a diet of coconuts, bananas, and the occasional fish. It's the monsoon season. Every day it rains heavily. You could catch some of this water before it soaks into the ground.
Water is a natural resource.
No-one makes us pay for the air we breathe, but we do pay for the water piped into our homes. Many conservationists argue that polluters should pay for pollution control, which is usually extremely costly. For example, pesticides used in farming drain into our rivers which feed our water systems. Make a list. Briefly think about how water supplies can be affected by other natural or man made disasters.