"Seaweed is packed with iron, zinc, Omega 3, protein and Vitamin B12 and is especially important for countries with a large vegetarian population like India, where it can provide a lot of the nutritional intake. India also has a huge potential for seaweed farming. It has a 17000-kilometre coastline and 700 types of seaweed but you don't yet know how to cultivate it so there's a lot of research to be done" - Vincent Doumeizel, author, The Seaweed Revolution, talks to Manjula Narayan about the many applications of seaweed including in promoting food security, improving health, in the creation of environmentally friendly clothing, in building materials and in combating pollution, among other things.