@rick1000 I appreciate your reasonable words.The area said to have a high SO2 rate also has some local air monitoring stations ,which give a "4~8 ug/m3 "date .So maybe someone is wrong.But people who connects SO2 with burning remains straightly don't care so much about it, they never ask what the truth is ,what the science is.

@rick1000 And three iron works...I wonder why some media connect this report with the
pneumonia in WuHan.