A pollutant emitted directly from the source is known as what?

A pollutant emitted directly from the source is known as what?

• A. Contaminant
• B. Secondary Pollutant
• C. Primary Pollutant
• D. Tertiary Pollutant

Answer: (C)

A pollutant emitted directly from the source is called a primary pollutant. It is released into the atmosphere in its original form, such as car exhaust, factory emissions, smoke, or dust. These pollutants can cause immediate health and environmental effects. They can also react in the atmosphere to become secondary pollutants—substances formed after the initial emission through chemical reactions driven by sunlight or other chemicals. A contaminant is a general term for any polluted substance and doesn’t specify how it enters the air, while secondary pollutants are formed in the air rather than released directly; tertiary pollutant isn’t a standard category in this context.

A pollutant emitted directly from the source is called a primary pollutant. It is released into the atmosphere in its original form, such as car exhaust, factory emissions, smoke, or dust. These pollutants can cause immediate health and environmental effects. They can also react in the atmosphere to become secondary pollutants—substances formed after the initial emission through chemical reactions driven by sunlight or other chemicals. A contaminant is a general term for any polluted substance and doesn’t specify how it enters the air, while secondary pollutants are formed in the air rather than released directly; tertiary pollutant isn’t a standard category in this context.