Cambridge IGCSE Environmental Management practice

Paper 1 structured question: Managing atmospheric pollution

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Paper

Marks

Topic

Managing atmospheric pollution

Exam-style question

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Paper 1TheoryPractical6 marks

A local government wants to reduce air pollution caused by vehicle emissions in a busy city.

Method

You are asked to design a simple investigation to measure the effect of different types of fuel on vehicle emissions using a gas analyzer.

a
State the independent variable in this investigation.
Your answer
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[1]
b
Identify two control variables that should be kept constant during the investigation.
Your answer
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[2]
c
Describe how you would ensure the reliability of the data collected.
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[2]
d
Suggest one safety consideration when conducting this investigation.
Your answer
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[1]

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Paper 1TheoryPractical5 marks

Results Table

The table shows SO2 emissions before and after installing FGD technology in the factory.

Time	SO2 Emissions (mg/m³)
Before FGD	150
After FGD	30

a
Calculate the percentage reduction in SO2 emissions after installing FGD.
Your answer
Aim for approximately 2 distinct marking points.
[2]
b
Explain how flue-gas desulfurization helps reduce atmospheric pollution.
Your answer
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[2]
c
Suggest one other method the factory could use to reduce atmospheric pollution.
Your answer
Aim for approximately 1 distinct marking point.
[1]