1.  Then, we will make better use of water and make a better world.

2.  I think, if we can do well these , we can make better use of fresh water and get rid of the problem.

3.  We should not only save energy but also try to make better use of our source.

4.  I thnk most of us will choose a peaceful way to die so as to bring a graet relief to our family members as well as to save the money fro a better use.

5.  Through advanced technology they make better use of their resources and also invent lots of new ways to better people's life.