The polluted 1 you're breathing could be slowly killing you, according 2 the World Health Organization, about 3 people die young from the polluted air every year. Air pollution is a huge problem for us all.
Smog is a combination(组合) of fog and smoke. PM2.5 is one of the 4 parts of smog, and it 5 the greatest r isk to human health. Beijing is one of the worst polluted 6 in China . It is said that only five days were not covered by heavy sm og in Beijing in the whole 7 of January in 2013. Its concentration(浓度)reached a record high of 993 on January 12, almost 50 8 the World Health Organization's standard.
9 smog can happen in any busy city, it's a particular problem in places such as Los Angeles,Smog becomes serious across China, especially in Beijing, largely 10 the high traffic levels, the large amount of coal burning, and the low quality of gas(汽油).
The sm og has made people in Beijing worry about their 11 . Many are choosing to travel out of the city 12 the thick smog, while others are buying air purifiers (空气净化器)to make indoor air clean. When the air is harmful, the government suggests people avoiding outdoor 13 . Officials have also closed some factories and ordered some government cars off the road. And they have made rules to stop new cement(水泥) and steel factories 14 opening.
All of us should play a part to 15 the environment for ourselves and our children. Also, the government should make rules to stop pollution.
