以How to change the world为中心用英语写5句话

How to change the world? Lots of people offen ask this question .Maybe it is impossible for someone himself but I think if we try our best to do we can make it. We can help to keep our world clean,we can help someone who is in difficule,we can do so many this to chang the world.we should believe that everyone of us is useful to the world and we can chang the world!