Question

Consider the following statements regarding SMOG:

1. SMOG was coined during the 1950's to describe a mixture of smoke and fog experienced in London

2. The principal pollutants in London SMOG are particulates and sulphur compounds 

3. The London SMOG occurs generally early in the morning on cold wet winter days 

Which of the above statements are correct?

1. 1, 2 and 3
2. 1 and 2 only 
3. 1 and 3 only
4. 2 and 3 only

Answer 1

Correct Answer - Option 1 : 1, 2 and 3

Smog:

• The term smog was first coined during the 1905s .
• It is used to describe a mixture of smoke and fog experienced in London.
• Major cities along the west coast of America were also experiencing a different type of air pollution.
• Smog occurs when emissions from industry, motor vehicles, incinerators, open burning, and other sources accumulate under certain climatic conditions.
• There are two types of smog: summer (the type of smog first experienced in America) and winter (the one first noticed in London).
• Smog is made up of many chemicals including nitrogen oxides (NOx), sulphur dioxide (SOx), carbon monoxide (CO), and volatile organic compounds (VOCs), but the two main components of smog are particulate matter (PM) and sulphur compounds.