雾霾的危害英语作文(4)

I sincerely hope all the citizens in Xi'an can work together to do something to save the air we breathe every day.

4雾霾来袭

Since the winter last year，the haze has occurred a lot of times.Haze is air pollution in which is mixed up with dust， smoke and other dry particles ，and it obscure the clarity of the sky and interacts with the natural environment.This kind of air pollutant come from a variety of natural and manmade sources. Natural sources can include windblown dust， and soot from wildfires. Manmade sources can include motor vehicles， and industrial fuel burning， and manufacturing operations. The one of the main cause that touches off haze is manufacturing operations. Many factories were over measure produced the smog that had over the standard and the smog seriously influence the air become air pollution.

it has done great harm to our daily life.many traffic accidents happened just because of the heavy haze weather，more and more people have to go to see the doctor because the serious disease caused by the haze，quite a lot of flights have to be put off，a great number of people have to stay at home for fear of the poisonous air caused by the haze.