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    				| 1. | Distinguish between primary and secondary air pollution | 
| Answer» Answer: A secondary pollutant is not a DIRECT EMISSION from a single SOURCE. ... Another example of a secondary pollutant occurs when nitrogen oxide and sulphur dioxide react with WATER in the atmosphere, creating acid rain. Other secondary pollutants include: smog, nitrogen dioxide, peroxyacyl NITRATES, and sulfuric acid | |