1.  It made use of scrap material and protect the environment.

2.  Air was polluted these days.

3.  It's necessary for us to protect the environment.

4.  It's important for us to protect the environment Don't destory the environment again!

5.  Protect the environment is a very important thing.

6.  The composition was about how to protect the environment and it must be completed before next Wednesday.

7.  Second, we should protect our environment, and discrease the polution of water.

8.  At the same time, we must protect our environment and limit the polution at all lengths .

9.  What I am studying is to protect environment.

10.  So we have to protect environment.