Fireworks and firecrackers explode with oxidant reagent, and the redox reaction S+2KNo3+3C═K2S+3Co2+N2 multiplies with Co and No gas to produce explosion and loud noise; Accompanied by various colors of light environment, light pollution, noise pollution, solid pollution and air pollution, acid rain is produced, and explosion accidents in production, transportation and discharge have caused at least 60-70 casualties and thousands of fires. At the beginning of this afternoon, a fire broke out in Zhejiang CCTV, causing 5 deaths and 2 injuries. 2 1 19 February, fireworks were set off in Tangjia Garden residential area of Bengbu City.