Fresh air is essential for our health. But we do not get it all the time of the day. It is only early in the morning when we get fresh air. During the daytime movement of men and animals kicks off dust into the air and the playing of various kinds of motor vehicles, as well as the running of mills and factories, emit poisonous gas and smoke that dangerously pollute the air. If anybody inhales this polluted air, he is likely to get various kinds of chest diseases. The sleep and tranquillity of the night allow the day’s polluted air to become pure. Thus we can inhale fresh air at dawn. Many people walk in the morning to breathe fresh air. In invigorates heat and lungs and keeps to body healthy. So we should invariably try to avail ourselves of fresh air.