main index

P00: frame around

P01: olicognography

P03: infrastructures

wayout:contact

Registers of application docs

fuelsemissions

airclean.methods

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incom&energ.

Similar user docs

worldsolar

chem.haz.

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urb.gasol.cons.

Air Pollution

Air Health & Allergies

Greenhouse gas contribution

Professional asthma


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


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

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

Contaminant

Major pollutant

Natural sources

Atmospheric times


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 g.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

Places of use docs

USAwinds

ecol.assess.

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economiclocation