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Emission

Wood Energy Data

Total - Sectors - Cookstoves

Emissions from fuel combustion (depending upon the combustion efficiency) include CO2, CO, CH4, NOx, SOx, etc., among which CO2, CH4 and N2O are known to be green house gases (GHGs). Thus, global warming is one of the environmental impacts of fuel use. Hundreds of hydrocarbons are also emitted during the combustion and many of them are health hazardous chemicals.

There are various types of emission data of fuels. When referring to country and sectoral total, the emission data are usually inventory type, i.e. based on default or typical emission factors. Data obtained by field or lab testing, of a cookstove for example, is categorised as measured emission factors. Sometimes, emission factors, especially for biomass stoves, is weighed according to testing conditions, fuel used, etc. They are grouped as weighed emissions factors. Click here for more information on the sources of emission data.

Total

For most RWEDP member countries`, biofuels account for more than 50% of the total carbon emissions due to the high consumption of biomass in these countries. The data presented in this database does not take into account the sustainability of biomass fuel use. Under sustainable conditions, biomass fuel is principally CO2 neutral.

Share of Carbon Emissions from Biofuel in Country's Total (1990)
Biofuel vs Fossil fuels

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Sector Emissions

Total Carbon Emissions per Sector in 1990
Unit:
Gg CO2 equivalent
Agriculture Energy Industries Land use change, forestry

Waste

Total

Bangladesh 28,678 21,207 1,491 19,738 924 72,038
China 383,440 2,325,305 93,988 -281,234 18,877 2,540,376
India 341,064 565,245 24,510 1,485 69,048 1,001,352

Indonesia 75,332 156,863 17,844 -334,904 6,039 -78,825
Myanmar 39,203 6,086 180 -6,656 2,686 41,500
Pakistan 45,083 69,450 3,733 9,830 4,611 132,706

Philippines 26,719 43,473 4,132 82,060 8,005 164,390
Thailand 54,527 79,659 9,813 78,108 3,068 225,176
Vietnam 48,192 27,497 3,087 31,246 1,674 111,696

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Cookstoves

Currently employed cookstoves have fairly poor efficiency, and consequently higher emissions comparing to other fuel/stove combination. Typical figures are presented in the following table.

Fuel/stove

Combustion efficiency

Overall efficiency

Emission factors on energy basis (g/MJ)

CO2 CO CH4 TNMOC N2O
Biogas

99%

57%

81.5

0.11

0.06

0.03

0.0054

LPG

98%

54%

67.3

0.33

0.00

0.41

0.0032

Kerosene

98%

50%

70.2

0.41

0.01

0.35

0.0018

Fuelwood

90%

23%

90.7

4.34

0.26

0.53

0.0059

Crop residues

85%

14%

89.4

4.53

0.52

0.58

0.0034

Dung

85%

11%

87.3

4.25

0.51

1.60

0.0263

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© FAO-RWEDP, 31/12/02