The fuel mix for the year 1 April 2016 to 31 March 2017 is shown below.
|Spark Energy||UK average|
|CO2 emissions (g/kWh)||298.0||254.0|
|high-level nuclear waste (g/kWh)||0.00079||0.00147|
The fuel mix values are the GB Residual Fuel Mix, which means the supplier does not have generator declarations for the sources of the electricity they are supplying. Figures for CO2 and nuclear waste were not stated by Spark Energy and have been calculated by us based on the fuel mix.