Unbalanced Distribution / Public-interest Ad

As we know, water is very important to people, we can’t live without water. But the earth’s water resources are unevenly distributed, much of it’s soil is poor, and climate change is likely to increase water stress in key parts of the earth. The amount of water which is suitable to drink is less and less. But some people don’t care about it. If we don’t save water, the last drop of water will be a tear-drop of us. Although about 70 percent of the earth's surface is covered with water,there are many places in the world still running out of water. So we should make good use of water on earth.