Q56 How can we get fresh air? A This is a stupid question at the smoking person who has inhaled the smoke polluted purposely. However, this is the problem which must be supposed earnestly for healthy maintenance. Inattention is impossible although it is clear that the country is better than a city. Air pollution is diffused broadly. And it will be soiled to the place which is not considered according to a wind. There is air pollution peculiar to the country also in the country. It is agricultural-chemicals spraying. A deadly poison is broadly sprinkled by the year by the helicopter several times. It is the poison bound in order to kill the insect which is a comparatively large-sized life. Of course, it does the serious damage also for a human body. The toxicity is no match for exhaust gas. It is not only this much. The agricultural chemicals bound around the agricultural products of trees or a field will also be polluted to a private house according to a wind. Moreover, the country also becomes the abandoning space of an industrial exhaust thing. In the inside of an exhaust thing, there is also a liquid put in the drum, and it starts leaking and may volatilizationize. The place where air is comparatively safe has only the detached island left distantly from a mainland in the present advanced nation. It is better to suppose so.