没有空气我们就不能活，......请以Fresh Air为话题，写一篇短文。
提示词：villagers,more healthy,than,towns,air,fresh,all day in the fields,breathing fresh clean air,cities,full of smoke,dust,disease
Poeple in villages are healthier than people in towns. That is because the air in villages is very fresh. Farmers are working all day in the fields, b
