Omega-3 fatty acids are vital for human health. But how can we source them sustainably? Professor Johnathan Napier of Rothamstead Research, talks about the role that Omega-3 fatty acids play in our diets, how we currently source them from algae via fish, and how he hopes to use genetic engineering to breed plants that produce these molecules in their oils.

The accompanying notes include a teachers' summary, plus student questions and answers.