我的自翻版本：
We have a sense of modern civilizaion and experience the high speed brought by the electronic times when we see skyscrapers springing up and cars roaring past; but at the same time,we lose the blue sky with clouds floating and the fresh air full of faint scent from the earth.By now we realize that air,water and sunshine are the essential elements of the environment and the shared property of human beings.The rapid developemt of our society and economy sharply increase the number of cars.Now the auto-pollution has become the major ari pollution in cities.Auto-pollution seriously affects people's normal life.In the face of the severe situation of preventing auto-pollution,people have to prepare for a long term batter.This article describes the main cuases of auto-pollution and the necessary methods to control auto-polllution effectively.
Key words:auto-mobiles causes of polllution methods of prevention
不是很严谨的译文,可以对照你的原意修改一些词语之后再用.