One possible version:

      From the pictures we know that much water has been polluted. Some factories are pouring waste water into

rivers and lakes. The water becomes dirty and lots of fish have died. Many people often waste water. For

example, they often forget to turn off the taps. If we don't have enough water,land will be dry and crops will die.

We can't live without water. So we should try our best and encourage everyone to protect water resources. We

must save water and stop polluting it. If we do that, things will be much better.