一篇英语作文 “We have only one home --Eath”

we have only one home-earth
A study warns that the earth's temperature is approaching a level not seen in a million years,implying that we are getting close to "dangerous" levels of human pollution,so the most serious problem is Global warming!
There are so many things cause this problem,such as the increase in the number of cars,lots of trees ware cut for furniture,the increasing of human being is also one cause.
How to save earth?I think we have many things to do.For example,we can planting trees as many as possible,we can by bus rather than by private car when we want to go out.