Ashley Cooper / Turf roof on eco houses at the Centre for Alternative Technology in Machynlleth, Wales, UK, July,

Nick Turner / Family with with solar panel display at the Centre for Alternative Technology, Machynlleth, Wales

Nick Turner / Two hands holding two different types of home made compost at the Centre for Alternative Technology, Machynlleth, Wales

Nick Turner / Visitors looking at wind turbine installation at the Centre for Alternative Technology, Machynlleth, Wales

Nick Turner / Woman using wind up radio at the Centre for Alternative Technology, Machynlleth, Wales

Nick Turner / Children playing near a pond at The Whole Home exhibit at the Centre for Alternative Technology, Machynlleth, Wales