One possible version:
Low-carbon life is good for everyone.To help with the environment,I always walk or ride a bike to
school instead of taking a car.Besides,I use both sides of every piece of paper and I never forget to turn
off the lights when I leave the classroom.
I think it's my duty to live a low-carbon life.And even the simplest activities can make a real difference
to the environment.So I suggest we should reuse books as long as possible.And we'd better not spend
much money on expensive clothes.I believe we can make our world more and more beautiful.