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True
False
Smaller particles (less than 2.5 micrometers)
Larger particles (greater than 2.5 micrometers)
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Liquids
Solids
Gases
All of these
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True
False
O
O2
O3
04
Approximately 90%
Approximately 75%
Approximately 60%
Approximately 45%
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Oxygen
Carbon
Nitrogen
Methane
True
False
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One third
One quarter
One fifth
One sixth
Lung cancer
Heart disease and stroke
Lower respiratory infections
Something else
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1-3
4-7
8-10
11+
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6.5
7
7.5
8
310
410
510
610
210 thousand tons
210 million tons
210 billion tons
None of the above
25%
10%
3%
1%
3%
23%
13%
30%
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5%
50%
70%
25%
They don't absorb any
1-25%
26-50%
51-60%
1-1000 nanometers
1-1000 micrometers
1-1000 millimeters
1-1000 centimeters
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True
False
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3
4
5
10
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Oxygen 78%, nitrogen 21%, other gases 1%
Nitrogen 78%, oxygen 21%, other gases 1%
Nitrogen 70%, oxygen 29%, other gases 1%
Carbon 78%, oxygen 21%, nitrogen 1%.
One third
One half
Two thirds
Three quarters
7
6
5
4
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96%
97%
98%
99%
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18 million
20 million
28 million
30 million
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77%
87%
97%
67%
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60%
65%
70%
75%
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LC, NT, VU, EN, CR, EW, EX
LC, NT, EN, VU, CR, EW, EX
NT, LC, VU, EN, EW, CR, EX
NT, LC, VU, EN, CR, EW, EX
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12
24
36
48
6,000
9,000
11,000
20,000
50%
80%
25%
60%
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Soya plantations
Commercial logging
Cattle ranching
Mineral extraction
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Oxygen
Methane
Water vapour
Nitrous oxide
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1 - 14
1 - 10
0 - 12
0 - 14
10%
1%
0.5%
0.1%
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30%
40%
70%
60%
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1700-1730
1730-1760
1760-1820
1820-1860
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15
20
25
30
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0.8 c
1.0 c
1.1 c
2 c
£1 billion
£10 billion
£15 billion
£20 billion
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14%
40%
50%
24%
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25%
50%
75%
40%
60%
70%
80%
90%
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Troposphere, Stratosphere, Mesosphere
Stratosphere, Mesosphere, Troposphere
Stratosphere, Troposphere, Mesosphere
Lithosphere, Stratosphere, Troposphere
40%
45%
50%
60%
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60%
70%
80%
90%
10%
20%
30%
40%
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