Ikea has joined up with a thing calling itself the Big Clean Switch, which wants to make it easy for households to switch their energy supplier to one that can demonstrably prove it sources 100 per cent of its electricity from renewable sources.
Of course, there's no guarantee that the particular units of power you desperately throw into your phone will have come directly from a turbine in Scotland, as most of the UK's generated power is dumped into the big, networked energy swamp, then distributed as needed. What you're doing when switching to a renewable supplier is hoping they match your usage by putting in the equivalent amount of renewably sourced power.
Vague promises are made about it saving customers money on their bills too, although presumably that's assuming people who've never bothered switching suppliers before are suddenly encouraged to do so for the first time because a leaflet in Ikea says it's a good idea. [Big Clean Switch via Guardian]