关于雾霾天气的英语作文.100词左右.要点：①多数人出门都会带上口罩,有的人甚至给自己的宠物狗也带上口罩.②产生问题的原因及危害.③应当采取的防治措施..

Air pollution is one of the most serious problems around the world
With the development of industry,there are many factories producing terrible gas.Many people have personal cars.They give out harmful gas into the air.They create air pollution.
Air pollution makes fog haze weather appear in many cities.It can cause traffic accidents.It can also cause sore eyes and breathing problems even cancer.It does great harm to people's health.
We should do something useful to make air clean and fresh.We can plant more trees.We'd better walk or ride bikes.Our government must pass laws against air pollution.It's our duty to prevent air pollution.