Hazy weather in Tianjin

Because minerals are used as fuel in industrial production, a large number of pollutants are discharged into the air, coupled with a large number of automobile exhaust, and heating in winter also discharges dust into the air, resulting in a large number of tiny dust particles, smoke particles or salt particles suspended in the atmosphere, forming smog. Sprinkling water on construction sites and roads in time can reduce air pollution; The use of fossil fuels in private cars and industrial production will pollute the air. Burning paper money and setting off firecrackers during the Spring Festival in Tomb-Sweeping Day will also reduce air quality and increase the occurrence of smog.

Therefore, choose: B.