Q. Which of the following pollutants is also known as “pea soupers”?
Answer: Smog
Notes: Pea soupers" refers to thick, dense, and highly polluted fog, particularly in urban areas. The term originated in reference to the intense smog that occurred in London, England, during the 19th and early 20th centuries. These foggy conditions were so dense and dark that they resembled the appearance and consistency of pea soup, hence the name "pea soupers." The smog was primarily caused by the burning of coal for heating and industrial purposes, which released large amounts of smoke, soot, and sulfur dioxide into the atmosphere. This, combined with atmospheric conditions, led to the formation of the characteristic heavy fog that severely reduced visibility and had adverse effects on health. Efforts to reduce air pollution and improve air quality have significantly reduced the occurrence of such "pea soupers" in modern times.