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The Panama papers have already led to the removal of one political leader - the prime minister of Iceland. Could the president of Argentina be next? Mauricio Macri is now the subject of a criminal investigation into his financial affairs after the leaked documents from the Panamanian law firm showed a business group, owned by his family had set up a firm in the Bahamas - something he had not previously declared. Daniel Gallas, our South America business correspondent, assesses how much threat the president is under.

What is 35 metres long, shaped a bit like a train tunnel, and produces electricity and pure water from sunlight? It's something called Watly. And it could be the best way to bring the basics of life, cheaply and cleanly to developing countries. Essentially, it's a computer that uses solar energy to purify water as well as generating electricity. It has been developed as a commercial project with European Union funding. We hear from the project's founder, Marco Attisani.

Richard Pennycook is pretty unusual. He is almost unique. The head of the Co-op Group in Britain has asked for a 60% cut to his total pay package because, he says, the job has become easier. The Co-Op seems to be recovering from what has been a very bad few years. That said, he will still take home more than a million dollars. Chris Roebuck is Professor of Transformational Leadership at Cass Business School in London. His latest article is entitled Madness or Leadership? So with Mr Pennycook, which does he think it is?

All this and more discussed with our two guests on either side of the Pacific: Madhavan Narayanan, writer with the Hindustan Times, in Delhi and Alison Van Diggelen of Fresh Dialogues in Silicon Valley.

(Photo: Argentine President Mauricio Macri arrives to deliver a speech at Casa Rosada Government Palace in Buenos Aires on April 7, 2016, after a prosecutor opened an investigation on his offshore financial dealings leaked in the Panama Papers. Credit: Getty).