The Food Programme: Microalgae - The Next Big Thing?

Sheila Dillon enters the murky green and bright blue world of microalgae and cynobacteria to meet the people who believe humble pond scum could be the secret to securing food for the world's growing population. She tells the story of Saumil Shah who is growing spirulina on rooftops in Bangkok and Simon Perez who has been inventing hot dogs, crisps and salad dressings from spirulina in Copenhagen. She hears from one of the world's leading algae scientists, Alison Smith, Head of Plant Sciences at the University of Cambridge, and nutritionist Rhiannon Lambert before finding out how microalgae could feed astronauts as they embark on missions to Mars