屋外におけるタバコ煙の周囲への影響 : 京都の某寺社における大気中のPM2.5濃度の測定による評価

Abstract

Secondhand smoke may have several adverse effects on humans. In April 2020, the revised Health Promotion Act came into effect in Japan, making smoking within buildings where people gather a punishable offense. However, this law has not provided clarification on the presence of secondhand smoke outdoors. This study aims to clarify the effects of tobacco smoke on surroundings in an outdoor temple in Kyoto. We generated artificial tobacco smoking via the use of a 50 cc syringe at the test point (TP) in an open space smoking area of the temple and measured the particulate matter 2.5 (PM2.5) level of the surrounding area (horizontal: 5, 14, 23, and 35 m, downward in vertical: 2, 5, and 8 m from the TP). Subsequently, the PM2.5 levels were increased above the environmental standard level set by the Japanese Ministry of the Environment in all horizontal and downward vertical points. The PM2.5 levels increased spontaneously at a horizontal distance of 5 m from the TP, with a maximum particulate level of 649 μg/m3, and at a downward vertical distance of 2 m from the TP with the maximum particulate level of 156 μg/m3. Tobacco smoking resulted in a high level of secondhand smoke over a long distance from the smoking point outdoors, both in horizontal and downward vertical directions.