Dear Bill,
Im glad to receive your letter,thank you for your caring for the weather and my health.Now Id like to tell you something about the smog.
Since the winter last year,the smog has occurred a lot of times.it has done great harm to our daily life.many traffic accidents happened just because of the he**y smog weather,more and more people h**e to go to see the doctor because the serious disease caused by the smog,quite a lot of flights h**e to be put off,a great number of people h**e to stay at home for fear of the poisonous air caused by the smog.
People h**e realized the great harm caused by the smog and the importance of protecting the environment.people all over the country are taking measures to reduce the smog weather.the government suggests people go to work or school with the public traffic, such as the bus and the underground.Also we should plant more trees.