Smog

Before you ask, no, these images are not blurry they are showing smog. Smog is smoke in the atmosphere that was emitted from different sources typically factories that mixes with fog that is already present in the air. Basically different types of factories or the industries are responsible for the formation of the smog. It can be seen how industrialization directly has affects on smog because the factories established during industrialization are factors in creating smog.