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Band 6+: Task 1: (Line Graph) Differing amount of nitrogen oxide by four types of vehicles.

Image for topic: Task 1: (Line Graph) Differing amount of nitrogen oxide by four types of vehicles.
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The image displays nitrogen oxide emissions (g/km) data by speed (kph) for four vehicles: Buses, Lorries, Petrol cars, Diesel cars. Buses: 10kph: 40g/km, 20kph: 36g/km, 30kph: 33g/km, 40kph: 30g/km, 50kph: 28g/km, 60kph: 27g/km, 70kph: 27g/km, 80kph: 29g/km, 90kph: 31g/km, 100kph: 34g/km, 110kph: 37g/km, 120kph: 40g/km, 130kph: 43g/km. Lorries: 10kph: 33g/km, 20kph: 30g/km, 30kph: 27g/km, 40kph: 25g/km, 50kph: 22g/km, 60kph: 18g/km, 70kph: 16g/km, 80kph: 18g/km, 90kph: 20g/km, 100kph: 22g/km, 110kph: 24g/km, 120kph: 26g/km, 130kph: 28g/km. Petrol cars: Between 10-130kph: consistently 10g/km. Diesel cars: 10kph: 7g/km, 20kph: 6g/km, 30kph: 5g/km, 40kph: 5g/km, 50kph: 5g/km, 60kph: 5g/km, 70kph: 5g/km, 80kph: 5g/km, 90kph: 6g/km, 100kph: 6g/km, 110kph: 7g/km, 120kph: 7g/km, 130kph: 8g/km.
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Note: Both the topic and the answer were created by one of our users.

The line graph illustrates the amount of nitrogen oxide emissions, which was produced by different transports ,namely buses, lorries, petrol cars, diesel cars.

Overall,it is clear that the figure for buses is dominant ,while diesel cars are the least harmful. Both vehicles experienced a gradual decline before going up. Additionally, figures for petrol cars and diesel cars are relatively stable.

Turning to the details,there was a gradual decrease in the rate of the emissions produced by buses from 40 g/km to just over 25g/km ,which meant the figure hit its lowest point ,at the speed of approximately 60 kph .After that, it continued its growth as gradually as it fell in the beginning. Nearly the same trend goes for lorries . Having started at below 35 g/km , the figure then fell steadily to under 20 g/km, at the speed of 90 kph. Furtherly, it continued rising ,but in a slower temper.

As regards stable figures with lowest nitrogen oxide harm, petrol cars and diesel cars experienced no changes ,remaining relatively stable at any speed and being at 10 g/m and 5 g/m,relatively.

Word Count: 183

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