Question

the hazy brown air caused by air pollution mixed with certain weather is called ______. a fossil fuel b coal c substance d smog

Explanation:

Smog is a type of air - pollution that appears as hazy brown air, often formed when pollutants mix with certain weather conditions. Fossil fuel and coal are sources of pollution, not the name for the hazy brown air. Substance is a very general term.

Answer:

D. smog