The air in the countryside is fresher than that in the city .Besides,the environment is much more cleaner than that in the city.Although,the streets in the city are wider and the buildings are taller than those in the county,the land in the county is greener than that in city.As is known to us all,the traffic is buiser in the city than that in the country.What's worse,it's much noisier at night than that in the countryside.