| | Pliny 23 ~ 79 | | | | | | | | | | | | | | | | | | | 1827 • | | | | 1849 | | | 1849 | 6529 | | 1861 | | | | | | 1876 | | | | | | | | 1899 | | | | | 6 | | | | | | | | | | | 20 | | 1879 | | 17 | | | 1903 24 | 1907 | | | 1910 | | | | | | | | | | | | | | | | | | | | 1911 4 | | | | 4 | | | | 1919 1932 | | 7.4 | 30% | | 1921 9 | | | | 1935 | | | | | | 1918 3 11 | | | 30% | 5000 1 | | | | | | | | | | | 1915 4 | 5000 | | | | | | | | | | | | 1952 12 | | 12000 100000 | | | | | | 1970 | | | | | | | | | PM2.5 | | | | | |