Glastonbury founder's solar-powered farm
6 December 2013 Last updated at 03:05 GMT
With lots of concern around rising energy costs and how power is generated, debate is continuing about the best way to keep the lights on in the years ahead.
Three years ago, Michael Eavis, the man behind the Glastonbury Festival, covered the roof of his cow shed with solar panels.
The energy it produces now plays a key part in keeping the farm running.
Although not enough to power the festival itself, Worthy Farm now generates around two-thirds of the power it needs to operate.
Claire Marshall went to meet Michael Eavis to find out more.