The earth,our home.It's very beautiful.Everyone likes our earth.But some people doesn't care of our earth.Some people said:"Why do I have to care of the earth?This isn't my responsibility!"They are wrong.The earth is our only one home.If the earth be more pollution.We can not live happily and comfortabiely.So what should we do for the earth?First,we can not throw rubbish casually.That can makes our earth clean.Second,we can drvie car less and makes the air fresh.If we can do it,the earth can existence longer and longer.