These rankings are based on the number of pence in the pound spent building new sources of green electricity (things like windmills) - that's pence in the pound from electricity bill revenue. It shows you how much of what you spend with them goes to the frontline, the real commitment each supplier actually makes - and these are long term average figures, this is a consistent story.
There are two ways to use the interactive table below –
Roll over any one of the categories, from A to G – to see which Energy Companies are in it. Or roll over an Energy Company name to see which category they are in.