Traffic is a source of air pollution. Name one other source of air pollution. Study Fig. 3, an isoline map, which shows air pollution produced by vehicles along part of a road. [Figure 3]

1. (a)Traffic is a source of air pollution. Name one other source of air pollution.[1]
2. (b)(i)On Fig. 3, shade the zone where air pollution is most concentrated.[1]
3. (b)(ii)Describe the distribution of the air pollution in relation to the position of the road.[4]
4. (c)(i)What was the wind direction on the day the readings were taken? Circle the correct answer below. north east south west[1]
5. (c)(ii)At which location D, E or F, was traffic queuing to pass an obstruction? Circle the correct answer below. D E F[1]

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