Table 2 Exposure emissions of air pollutants estimated using two geographical buffers: 750 or 250 m radii around volunteers’ households (Data expressed in tons per year).

	Buffers used to estimate the level of exposure (radius)
Pollutant and source	750 m		250 m
	Median	IQR	Median	IQR	p-value
PM10
Area sources	5.28	[3.11, 8.61]	4.98	[2.97, 8.56]	0.491
Point sources	0.14	[0.01, 1.69]	0.01	[0.00, 0.49]	<0.000
Mobile sources	2.50	[1.37, 4.86]	2.37	[1.34, 4.87]	0.679
Natural sources	0.03	[0.01, 0.05]	0.02	[0.01, 0.04]	0.070#
Overall emissions	10.60	[5.76, 16.06]	9.15	[4.90, 15.93]	0.282
PM2.5
Area sources	2.89	[2.22, 3.76]	2.86	[2.17, 3.95]	0.887
Point sources	0.08	[0.00, 1.05]	0.01	[0.00, 0.27]	<0.000
Mobile sources	1.28	[0.610, 2.61]	1.16	[0.60, 2.64]	0.548
Natural sources	0.01	[0.00, 0.01]	0.01	[0.00, 0.01]	0.080
Overall emissions	5.42	[3.20, 8.24]	4.82	[3.19, 7.49]	0.286
VOC
Area sources	130.90	[98.01, 154.1]	129.9	[94.51, 161.3]	0.567
Point sources	2.76	[0.11, 21.92]	0.23	[0.0, 6.21]	<0.000
Mobile sources	32.46	[21.46, 55.62]	31.78	[19.70, 54.00]	0.818
Natural sources	0.53	[0.24, 0.98]	0.44	[0.16, 0.81]	0.065#
Overall emissions	187.60	[132.10, 235.50]	184.10	[131.3, 232.0]	0.664
TOX
Area sources	49.21	[37.91, 61.63]	47.29	[35.38, 64.81]	0.705
Point sources	1.12	[0.04, 8.68]	0.05	[0.0, 3.15]	<0.000
Mobile sources	8.56	[5.438, 13.88]	8.51	[5.18, 13.58]	0.856
Natural sources	0.16	[0.06, 0.27]	0.13	[0.04, 0.26]	0.103
Overall emissions	67.74	[48.25, 89.63]	63.00	[45.92, 81.16]	0.240
TOC
Area sources	161.2	[126.4, 192.7]	158.5	[119.2, 199.4]	0.893
Point sources	3.14	[0.17, 23.95]	0.29	[0.0, 6.82]	<0.000
Mobile sources	35.14	[22.96, 59.27]	34.45	[21.45, 57.25]	0.894
Natural sources	0.53	[0.24, 0.98]	0.44	[0.16, 0.81]	0.065#
Overall emissions	228.6	[165.1, 282.0]	221.60	[158.4, 272.2]	0.538

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