At the Big Green Gathering, in Somerset, everything is run on renewable energy - including the sound systems, lighting rigs and entertainment performances.
At the Chill Out Laundrette, Alex Gadsen, of Cyclaen, demonstrates his pedal-powered washing machine - festival-goers can use the laundrette throughout the five-day event.
Trish Fenton whips up a strawberry and banana smoothie using pedal power to run her bicycle-mounted blender.
One-year-old Merlin was among those admiring the many sustainably-produced goods on offer in the festival's craft section.
Elspeth Thomson demonstrates one of the many solar showers onsite - the water is heated by black rubber coils, which absorb heat from the sun.
Sam's mobile sauna, heated by a wood-burning stove, is among the options for those needing a bit of pampering. Customers can bring their own wood to burn.
Horses transport people, baggage and equipment. Alternatives include bicycle trailers and hand-carts. The more conventional vehicles are electric or run on bio-diesel.
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