very difficult to get clean air in the city. with so many factory fumes and vehicle fumes, making clean air very difficult to obtain. this is also a problem for health. in the city to get clean air in only about 2 hours. usually at 5 to 7 in the morning before the factory and vehicle activities.
clean air contains oxygen. oxygen is very important for health. oxygen can be likened to food for all body cells. Oxygen will be in blood and channeled throughout the body. therefore, when you get a fresh place, breathe as much air as possible