Why copper wires? And do solar power and batteries herald the death of the old AC grid?
We spend the day in Athens and hear from Greek businesses as the government nears a deal.
Is a Greek deal imminent? Are more cuts and higher taxes a basis for recovery?
The latest from Athens with analysis of the latest Greek proposals to avert a euro exit.
We are live from Athens for analysis of the latest Greek proposals to avert a euro exit.
Greek protesters, economy minister Georgios Stathakis and a Brussels view
Dame Ellen MacArthur, Unilever and creators of an urban farm on reusing resources
The latest business and finance news from around the world, on the BBC.
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