What makes an eco-home?

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We hear what makes an eco-home, and find out why properties miss the energy saving mark. Seth Rutt is an architect with Hawkins Brown who explains how old homes can be made more energy efficient. Professor Arik Levinson of Georgetown University discusses energy-saving features that fail to live up to architectural and regulatory ambitions. And the climate campaigner George Monbiot tells us how expensive it can be to retrofit energy saving measures in older properties. Also in the programme, Nigel Newton, chief executive of publisher Bloomsbury, on how the US-China trade war is impacting profits at the company. Plus the BBC's Victoria Craig reports on the businesses jumping on the Brexit bandwagon to advertise their goods and services. (Picture: Homes with solar panels. Picture credit: Getty Images.)