HPH018 : Ecobuild 2013

London's Ecobuild has just concluded for another year and Ben Adam-Smith shares his experience of the event. In this episode he chats to four people he met there - Janet Cotterell from Passivhaus Homes, Jon Bootland from the Passivhaus Trust, Jo Gooding from the UK Cohousing Network and Robert Stern from Litmus Films.

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