Carbon Emission Factos (from IPPC 2006 Guidelines)
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Fuel
|
Unit
|
Value
|
|
Diesel
|
kgCO2/GJ
|
69,3
|
|
CNG
|
kgCO2/GJ
|
56,1
|
|
Energy Content
|
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Fuel
|
Unit
|
Value
|
|
Diesel
|
GJ/kg
|
0,043
|
|
CNG
|
GJ/Nm3
|
0,036
|
|
Consumption
|
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Fuel
|
Unit
|
2010
|
2011
|
Diesel
|
kg
|
13 402 300
|
12 845 756
|
CNG
|
Nm3
|
249 920
|
240 131
|
Activity
|
Unit
|
2010
|
2011
|
Vehicles
|
vehicle km
|
37 789 000
|
36 896 000
|
Passengers
|
passenger km
|
2 147 689 600
|
2 194 987 200
|
CO2 emissions
|
Unit
|
2010
|
2011
|
Diesel
|
tonCO2/annum
|
39 937,51
|
38 279,07
|
CNG
|
tonCO2/annum
|
504,74
|
484,97
|
Total
|
tonCO2/annum
|
40 442,25
|
38 764,04
|
Specific CO2 emissions
|
Unit
|
2010
|
2011
|
Veichles
|
gCO2/veich km
|
1 070,2
|
1 050,6
|
Passengers
|
gCO2/pass km
|
18,8
|
17,7
|
6,22%
|
The replacement of the bus fleet is based on replacing older generation vehicles with the ones that have the highest Euro-5 EEV exhaust emission parameters, which should help substantially reduce exhaust and CO2 emissions.