地下鉄ホームのＰＭ2.5濃度 最大で地上の約５倍にを英語にすると
Keio University group investigated PM 2. 5, an extremely small particulate air pollutant, whose effects on health are pointed out by subway By the way, I realized that it reached the maximum concentration of about 5 times the level on the ground. It seems that wheels and rails are being scraped off during braking, and experts point out that it is necessary to investigate the influence on respiratory or other diseases, long-term workers, etc. I will.
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