There is much more pollution and the air isn't cleaner.Lots of tree are cut down every year.We even can't see fish in some rivers.Our earth is in danger so we must sve our earth.We'd better save water,reuse the paper,recycle the things and so on.We should pick up the rubbish and put it into the dustbin.It's a good idea to plant more trees in sping.If everyone makes a contribution to our earth,it will become more and more beautiful.