Example of primary pollutant
A. SO2
B. NO2
C. CO
D. hydrocarbons
Answer: Option D
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What is the cause of the Exxon Valdez?
A. Oil Tanker which sank in 1989 along the coast of Alaska and marine life seriously affected.
B. a plane which crashed and caused death of human life
C. a ship which wrecked on the coast of India
D. none of these.
A. A much higher temperature than -10o C
B. A much lower temperature than -10o C
C. A temperature of -10o C
D. A temperature of -30o C
Infrared and visible satellite images might provide:
A. A way of determining cloud thickness and altitude.
B. A way of distinguishing between wet and dry clouds.
C. A way of identifying clouds suitable for cloud seeding.
D. A way of distinguishing between "new" and "old" clouds.
Primary pollutants cause pollution by their direct release into the environment . The substance released may already be present in some quantities, but it is considered a primary pollutant if the additional release brings the total quantity of the substance to pollution levels.
Even SO2,NO2 and CO are also primary pollutants. The Oxides of Sulphur, Oxides of Nitrogen, Oxides of Carbon, Particulate Matter, Methane, Ammonia, Chlorofluorocarbons, Toxic metals etc. are examples of primary pollutants.
These are emitted directly into the air.
Examples of secondary pollutants are Ground Level Ozone, Smog and POPs (Persistent Organic Pollutants).