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The Energy Supply Footprint estimates the greenhouse gas emissions associated with the consumption of electricity and gas by our customers.
The Energy Supply Footprint covers greenhouse gas emissions resulting from the production, transportation, distribution and consumption of electricity and gas throughout the energy supply chain.
Carbon dioxide is produced during the generation of electricity from the combustion of fossil fuels such as coal and natural gas. The emissions associated with losses from the transmission and distribution systems occur at power stations, where additional electricity is generated to cover these losses. There are no direct greenhouse gas emissions at the consumer end of the supply chain.
The Energy Supply Footprint emissions associated with the provision of electricity have slightly decreased, with a smaller volume of total electricity sales over the period compared with 2007/08. However, the estimated greenhouse intensity of electricity sold was marginally higher than 2006/07 due to a minor increase in the percentage of electricity purchased from the grid.
Source |
2008/09 |
|---|---|
Consumption |
0 |
Transmission & Distribution |
2.5 |
Generation |
34.6 |
Total |
37.1 |
In the case of gas supply, greenhouse gas emissions arise from the removal and venting of carbon dioxide at the gas fields, and some losses of methane and emissions from the combustion of natural gas as an energy source to produce the gas. Further emissions occur during transmission and distribution, comprising fugitive emissions and emission arising from the use of additional natural gas in compressors along the pipelines. At the consumer end of the supply chain the combustion of natural gas results in the production of greenhouse gas emissions.
The Energy Supply Footprint emissions associated with the provision of gas have decreased compared to 2007/08 due to a lower volume of total gas sales. The estimated greenhouse intensity of gas sold had a minor increase between 2007/08 and 2008/09 due to a change in the mix of gas sources.
Source |
2008/09 |
|---|---|
Consumption |
11.2 |
Transmission & Distribution |
0.9 |
Production |
2.2 |
Total |
14.3 |
