Haze, smoke, pungent smell?

This happens in many parts of the country, including a few foggy areas, but because many places are foggy and yellow, it is dark. Haze is mainly solid floating dust particles, and smog is mainly liquid water vapor. This weather is mainly caused by many parts of the country (Shandong, Hubei, Henan, Jiangsu, Sichuan ...), which produces a large number of floating dust particles and some toxic gases, which makes people affected by the gases produced by some combustion reactions and produces some adverse reactions and discomfort! In a word, this bad weather is not fog, but the technical term should be "yellow mud day"!