Presentation

PM 2.5 とは

大気中に浮遊している 2.5 μm 以下の小さな粒子
髪の毛の太さの 1/30 程度の大きさ
肺の奥深くまで入りやすく、肺がん、呼吸/循環器系に影響があるかも
物の燃焼などによって直接排出されるもの
硫黄酸化物（SOx）、窒素酸化物（NOx）、揮発性有機化合物（VOC）等のガス状大気汚染物質が、主として環境大気中での化学反応により粒子化したもの

PM2.5 [福岡県東区]

PM2.5 [熊本県益城]

PM2.5 [東京都千代田区]

PM2.5 年間推移

PM2.5 参考サイト

黄砂

砂漠、乾燥地域の砂塵が強風を伴う砂嵐で上空に巻き上げられたもの
ぜんそくや花粉症を悪化させるおそれがある
微生物や細菌などが乗って飛来することもある
アレルギーや食中毒の原因にも

wikipedia / 日本経済新聞参照

気象庁

黄砂の飛来は増えているのか？

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