Air Pollution |
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Air Health & Allergies |
Greenhouse gas contribution |
Professional asthma |
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|
Air allergen risks |
|
|
gas |
propor tion |
flours |
0.187 |
n° / m3 |
low |
median |
high |
CO2 |
0.53 |
isocyanates |
0.118 |
|
|
atopy |
allergy exacer. |
CH4 |
0.17 |
Latex & aldehydes |
0.053 |
fungi |
<1000 |
1000- 5000 |
>5000 |
N2O |
0.05 |
animals |
0.047 |
pollen |
<100 |
100 - 500 |
>500 |
HFC, CFC |
0.12 |
wood dusts |
0.039 |
animal dust |
< 2 micg/l |
2 - 10 |
> 10 microgr / l |
O3 |
0.13 |
|
|
|
|
|
|
ozone |
0.08 |
|
|
|
|
|
|
NO |
0.06 |
All population asthma rate |
0.02 - 0.15 |
Air pollution |
Greenhouse gas effect and power |
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|
80' |
90' |
00' |
gas |
origin |
years half life in atmosphere |
Caloric power |
New York |
105 |
11 |
|
CO2 |
Fossil fuels |
125 |
1 |
Washington |
26 |
13 |
|
CH4 |
Rumiant, rice etc. |
12 |
21 |
Atlanta |
7 |
8 |
|
N2O |
Nitrogen fertilizer |
150 |
310 |
Chicago |
16 |
4 |
|
HFC |
Coolant and propellant gas |
120 |
16000 |
Houston |
22 |
31 |
|
SF6 |
Gas leakage detector & electric insulation |
50000 |
24000 |
Denver |
46 |
8 |
|
CO2 production proportion |
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Seattle |
35 |
2 |
|
North America |
0.28 |
China |
0.13 |
San Francisco |
2 |
1 |
|
East Europe |
0.215 |
SE & S Asia + Australia |
0.12 |
Los Angeles |
210 |
170 |
|
West Europe |
0.154 |
Middle East |
0.026 |
|
|
|
|
Africa |
0.028 |
Latin America & Carri -bean |
0.046 |
Atmospheric traces gases problems |
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Contaminant |
Major pollutant |
Natural sources |
Atmospheric times |
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|
source |
Average year emission estimated |
source |
Average year emission estimated |
back ground |
Resi- dence time |
|
SO2 |
Fossil fuels combus -tion |
Volcanoes, biogenic Semissions |
212 |
20 |
About 0.1 ppb |
1 - 4 days |
|
H2S |
Chemical processes, sewage treatment |
Volcanoes, biogenic processes in soil &water |
3 as sulfur |
84 as sulfur |
H2S:0.05 - 0.1 ppb COS:0.5 ppb CS2:0.05 ppb |
H2S: 1 - 2 days COS: 1 - 2 years |
|
CO |
Self- exhaust, general combus tion |
Forest fires, photochemical reactions |
700 |
2100 |
North hem.: 0.1-0.2 ppb South hem: 0.04 - 0.06 ppb |
1 - 3 months |
|
NO, NO2 |
burning |
Biogenic processesin soil, lightning |
75 as NO2 |
180 as NO2 |
About 0.1 ppb |
2 - 5 days |
|
NH3 |
Waste treatment, burning |
Biogenic processes insoil |
6 |
260 |
About 10 ppb |
1 - 7 days |
|
N2O |
Small from combustion |
Biogenic processes insoil |
3 |
340 |
300 ppb |
20 - 100 years |
|
CH4 |
burning, natural gas leakage |
biogenic processes in soil &water |
160 |
1050 |
1.5 ppm |
8 years |
|
Isoprene & terpenes |
none |
Biogenic plants emissions |
none |
830 |
0 |
1 - 2 hours |
|
NonCH4 hydro carbons |
burning |
biogenic processes in soil & vegetation |
40 |
2* 10 |
0 - 1 µg.m for C
|
Hours or fewdays |
|
CO2 |
burning |
Biological processes |
22000 |
10 |
345 ppm |
2 - 4 years |
|
CH3Cl |
burning |
Oceanic biological processes |
2 |
4-6 |
600 ppt |
1 - 2 years |
|
HCl, CL2 |
burning, Cl manu factureing |
Atmospheric reaction of NaCl, volcanoes |
4 |
100-200 |
About 0.5 ppb |
About 1 week |
|