The popular science magazine includes the first of a series of reports from correspondents around the world.
Sergio Brandao reports on how sugar cane powers millions of cars in Brazil and meets the biologists who hope to make the fuel cheaper. Also this week, the rescue in progress for the Italian town of Orvieto.
Undermined by a network of tunnels and catacombs, it is in danger of slipping from its hilltop perch. And there's a return visit to the clinic which helps women at a critical stage of their pregnancy. With Howard Stableford, Kate Bellingham, Judith Hann, John Diamond, and Carmen Pryce. Producer Martin Mortimore
Editor Dana Purvis
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