One possible version:
Everyone can do something for our environment. For us, we should
try to save electricity in my daily life. For example, if I am the last
person to leave the classroom in the evening, I will always remember to
turn off the lights. In order to protect our forests, we will use paper
wisely. We should try to use both sides of paper whenever it is possible.
We will not use things like paper cups and disposable chopsticks because
they are made of wood. I believe that doing all these small things will
improve our environment and help make our world a better place to
live in.