As an infrastructure business, our day-to-day activities create greenhouse gas emissions (GHG).
We're aiming to reduce our greenhouse gas emissions by:
- putting carbon and environmental considerations into our decision making
- looking at innovative ways to operate our network
- reducing the leakage from insulating gases
- managing energy in our office buildings
- introducing alternative fuel vehicles in our commercial fleet.
Greenhouse gas emissions (Scope 1.2 and 3) million tonnes of carbon dioxide equivalent
Our total scope 1 and 2 emissions (including line losses) for 2018/19 were around 1.6 million tonnes of carbon dioxide equivalent (CO2e). This represents a 40% reduction on our 2012/13 baseline.
Breakdown of emissions 2018/19
Our greenhouse gases emissions come from four main sources:
- electricity transmission losses
- insulating gases (e.g. sulphur hexafluoride)
- electricity energy use and fuel used for transport.
The largest source of carbon emissions is transmission line losses. Line losses are taken into account when we decide on the type of overhead line we invest in. However, there is a limited amount we can do to reduce losses because they are mostly driven by the distance over which electricity is transmitted.
As electricity generation continues to decarbonise, losses will contribute lower carbon emissions because the lost electricity will be of a lower carbon intensity. Therefore, it’s largely out of our control.
Greenhouse gas emissions (without losses) thousand tonnes of carbon dioxide equivalent
Our controllable carbon emissions derive from our building energy use, our transport energy use and the leakage of insulating gases. From 2012/13, there’s been a 0.4% reduction from our controllable emissions.